Vacheron Constantin Les Cabinotiers Westminster Sonnerie – Tribute to Johannes Vermeer

September 28, 2021 MasterHorologer

Vacheron Constantin’s Les Cabinotiers department has been renowned for bespoke mechanical timepieces that represent the pinnacle of fine watchmaking and artisanal skills of the Geneva Maison.

Among the recent masterpieces from the Les Cabinotiers department, the the Les Cabinotiers Westminster Sonnerie – Tribute to Johannes Vermeer is a stand-out horological marvel. A project first undertaken in 2013, this bespoke pocket watch was made according to an esteemed client’s wish. This timepiece embodies art and beauty, exceptional mechanics and technical mastery.

This magnificent micromechanical wonder is equipped with a new in-house movement, Calibre 3761 with Grande Sonnerie and tourbillon, specially developed by the team of watchmakers who designed the Reference 57260 watch.

The craftsmanship adorning this timepiece is equally extraordinary. The case is hand-engraved on its bezel, back and sides using various artisanal techniques, as well as topped by a bow adorned with two hand-sculpted lion heads. The officer-type caseback is stunningly enhanced by a miniature enamel reproduction of Vermeer’s famous painting Girl with a Pearl Earring, created by enameller Anita Porchet.

Vacheron Constantin Les Cabinotiers Westminster Sonnerie – Tribute to Johannes Vermeer — Vacheron Constantin Reference 9910C/000J-B413 Pocket watch, Les Cabinotiers Westminster Sonnerie – Tribute to Johannes Vermeer

Les Cabinotiers is a department in its own right within the Manufacture Vacheron Constantin, dedicated to creating single-piece editions. Following in the footsteps of the Geneva master-watchmakers known as cabinotiers in the Age of Enlightenment, the team took up the challenge of giving substance to the dream of a passionate collector who wanted a pocket watch that was technically and aesthetically exceptional, reflecting the noblest traditions of 18th century Haute Horlogerie. To create this highly complex mechanical pocket watch, it took approximately eight years.

The Les Cabinotiers Westminster Sonnerie – Tribute to Johannes Vermeer pocket watch is powered by a new 806-part manual winding calibre, regulated by a tourbillon and comprising Grande and Petite Sonnerie Westminster chimes, coupled with a minute repeater. Within the range of watchmaking complications, Grande Sonnerie models have always enjoyed a special aura, not only because of the inherent complexity of these mechanisms striking several gongs, but also because of the musical qualities required.

Grande Sonnerie watches have a centuries-old tradition within the Maison. Among the oldest timepieces preserved to date, the first travel clock housing such a complication dates back to 1820. When it comes to pocket watches, the oldest model with Grande and Petite Sonnerie in the Vacheron Constantin private collection is dated 1827.

It was followed by several timepieces equipped with such mechanisms, some of them representing landmark creations endowed with an array of extremely sophisticated complications, such as the “Packard” presented in 1918 or the King Fouad I watch completed in 1929.

More recently, the world’s most complicated pocket watch, Reference 57260, was presented in 2015 on the occasion of the Maison’s 260th anniversary, affirming the expertise of the Maison in the realm of exceptional watchmaking.

The client who commissioned this model wanted a real Westminster chime pocket watch with striking five gongs with five hammers, featuring a Grande and Petite Sonnerie and adorned with miniature enamel. The Calibre 3761 measures 71 mm in diameter and 17 mm thick. It is regulated by a tourbillon majestically enthroned on the lower part of the movement, visible through the caseback and performing one full revolution per minute.

The tourbillon is driven by a 2.5Hz balance (18,000 vibrations per hour). The Westminster chime with which the movement is equipped with one of the most complicated striking mechanism to build, as it requires a sequence of five gongs struck in perfect harmony by their respective hammers controlled by four racks.

In wristwatches, Grande Sonnerie (grand strike) mechanisms are usually operated by a single rack, mainly for reasons of miniaturisation. The four rack and snail solution, with four racks for the hour and quarter chimes and one rack for the minute repeater, enhances the sequencing of the melodies and, as an added subtlety, enables different melodies to be played when passing the quarters.

The term ‘Westminster chime’ refers to the world-famous bells of Big Ben, the British Tower of Parliament in London: a four-bar melody consisting of four notes played at different frequencies. In “Grande Sonnerie” mode, the watch chimes the quarters in passing, with the hour repeated at each quarter, meaning three bars of the Westminster melody followed by five single notes for 5.45 am.

In “Petite Sonnerie” mode, it strikes the quarters at each change of quarter without repeating the hours; and at each change of hour, it strikes the fourth quarter – “the carillon” – as well as the hours. The strikework can be activated at any time by means of the slide on the side of the watch. The watch then functions as a minute repeater that chimes the quarters, minutes and hours in sequence. The selector switch positioned at 9 o’clock thus offers three possible modes.

In “Sonnerie” (strike) mode, the watch is automatically activated each time the quarters change, like a clock. In “Night Silence” mode, a special feature specifically developed and adapted to this 3761 calibre according to the time zone chosen by the customer, the alarm is deactivated between 11 pm and 9 am, thus saving energy as well as ensuring peace and quiet at night. The third and last “Silence” mode completely suspends the striking mechanism.

A second selector, positioned between 10 and 11 o’clock, serves to switch from Grande Sonnerie to Petite Sonnerie as preferred. The two barrels ensure an autonomy of approximately 16 hours for the musical mechanism in “Grande Sonnerie” mode and 80 hours for the time indications, with stable torque guaranteed until the end of the power reserve.

Calibre 3761 is equipped with a centripetal strike governor ensuring perfect regularity of the musical sequences, of which the notes must be both distinctly audible and pleasing to the ear. The system is characterised by a pair of weights whose very special shape has been optimised so as to generate a kind of “engine-braking effect” – by centripetal force – on the regulator’s pivot axis, thereby evening-out the energy released by the barrel.

This unique and original device is also perfectly silent. In another special feature regarding the flow of time, the calibre houses a double-wheel system with clearance adjustment. Given the size of the hands, in order to avoid any potential jerking of the seconds hand positioned at 6 o’clock, such a mechanism ensures its smooth flow thanks to a system based on two coaxial toothed wheels linked by a spring serving to eliminate gear play.

This Les Cabinotiers model demonstrates high standards and attention to detail in terms of movement finishing. All the components are thus hand-finished – from the completely engraved balance bridge to the bridges buffed with diamond paste to achieve a mirror-polished finish, as well as the galvanic treatment of the plates adorned with Côtes de Genève and featuring a soft champagne colour – creating an overall effect evoking the noblest watchmaking traditions.

The work on the ratchet wheel and the two barrel wheels is an excellent example of these meticulous tasks. The wheels first underwent surface treatment in the form of sandblasting and then sunburst finishing, before the teeth were glazed on all five gear portions. This type of finishing consists of chamfering the teeth and giving them a mirror-polished finish on the flat parts, a skill formerly used in watchmaking and that the Maison is committed to preserving. A week of patience and meticulous care was needed to decorate these three components.

The tuning of the gongs also requires a perfectionist’s spirit. First tested before being cased-up, they are shaped in such a way as to obtain the right note for each of them. This inevitably requires touching up with a file to achieve a perfect sound. There can however be surprises once the chiming mechanism is cased up. On this model, two of the five original gongs had to be replaced for the sake of harmony. By modifying the steel alloys, the sound of the two new gongs acquired a more crystal-clear entirely in tune with the other three.

This “tuning” of the Grande Sonnerie thus requires several successive casing-up procedures, since the mechanism has to be removed for any adjustments during the “trial runs” of the mechanism. These are indeed not the only elements of the assembled movement that undergo retouching during these various phases, which is why the latter take place even before the case is decorated. An additional difficulty with this single-piece edition was that it was impossible to case up the entire finished movement and part of the final assembly had to be done directly inside the case.

Given the level of finishing and decoration of each component, including the case, as well as the fact that any handling manipulation could potentially impair the quality, the ten operations involved in fitting the calibre – which had to be removed the same number of times for retouching – followed by the final assembly required an uncommonly deft touch. In the end, a very small team of specialised watchmakers conducted the making of this Calibre 3761, from the development, manufacturing and finishing of the various components to the final assembly and casing-up of the movement.

The client expressed the wish that the cover of the officer-type caseback should feature a miniature enamel painting by enameller Anita Porchet. The work chosen was Girl with a Pearl Earring, painted circa 1665 by Dutch artist Johannes Vermeer.

Above and beyond the challenge of reproducing the work of a great master, the size of the 98 mm-diameter surface implied additional difficulties. This size of watch, corresponding more to that of historical carriage watches than to a pocket model, requires a degree of dexterity all the more accurate in that the slightest irregularity is glaringly obvious.

The result is reminiscent of the grand miniature enamel painting tradition in which Geneva came to specialise. Acknowledged since the late 16th century for its production of high-quality enamels, Geneva in fact lent its name to several terms referring to the quality of the work of its craftsmen. “Geneva enamels”, a term commonly used since that time, refers to painted enamels covered with a flux known as the “Fondant de Genève”.

This technique consists of adding a final transparent and colourless protective coating to the layers of vitrified enamel, thereby giving brilliance and depth to the artist’s work. This invention greatly benefited the timepieces of the period, which were subjected to repeated friction as pocket watches.

Only a few rare master enamellers still master these techniques. One need only think of the fact that a single layer of enamel on the young girl’s oriental turban requires at least two weeks of work given the size of the model.

The colour palette is similarly complex, notably including a composition of seven shades to obtain black, as well as 20 or so firings in the kiln required to stabilise the colours. In all, seven months of intermittent work were necessary to bring this portrait to life. The research and development work – notably relating to the pigments and enamels to be used – began in 2018 and the final result was completed in 2020.

While the decoration of watches and clocks using the various enamelling techniques strongly contributed to the reputation of the Fabrique de Genève which encompassed all the watchmaking and jewellery trades in the 18th century, the term “Geneva enamels” refers above all to enamel miniature painting.

This process consists of painting colours – based on metallic oxides ground to powder and then mixed with an oil-based binder – onto a layer of white enamel coating a copper or gold leaf base. Much like in gouache or oil painting, the master artisan then applies colours to a canvas, enabling a meticulous depiction – these days under a binocular microscope – of even the smallest details. After each phase, the colours are stabilised by successive firings in the kiln, with no chance of touch ups.

The main watch dial is Grand Feu enamelled in an eggshell colour with blue enamelled Roman numerals.

The style of the engravings adorning the case was carefully studied by Vacheron Constantin’s engraver in order to blend harmoniously with Vermeer’s painting. After several proposals and discussions with the client, she chose a main ornamental theme composed of acanthus leaves running along scrolls and flowers with a pearl heart. This motif echoes the theme of The Girl with the Pearl Earring with its classical and feminine decoration.

The talents of Vacheron Constantin’s master-engraver have created a visually striking result. Her work began by outlining the décor using a scriber. She then proceeded to create a champlevé effect by flat-hollowing around the motifs, creating volume and depth by carving them with a burin.

Observation and analysis of the pattern is essential to understand the volumes before cutting into the metal. To keep the rhythm and flexibility of the acanthus leaves along the accompanying line, the curves must be stretched. The facets and stripes are then cleaned and polished. This work requires time and patience.

Polishing is indeed a delicate operation to find the right balance between the shimmer of the metal and the volumes of the sculpture which lose their dynamic appeal if they are too rounded. In order to accentuate the shadows and to add details to the leaves and flowers, slender hollow lines are made on each of them using the fine line engraving technique involving incising or hollowing out the material.

The last operation, the point-by-point hand-chasing of the background, accentuates the contrast between the matt chased champlevé surface and the polished motifs. This operation improves legibility and highlights the decoration by its shimmering appearance. Chasing creates a decoration or a texture by striking the material, unlike engraving and sculpture which involving removing material.

The adornment of the case middle is further emphasised by a double ‘pearl’ border, a reference to the painting by Johannes Vermeer. The creation of this border begins with an even distribution of engraved squares running around the bezel and caseback. Then the engraver transforms these squares into half-beads using a beading tool with a spherically hollowed tip leaving an imprint serving to form the half-beads of metal.

Handling this instrument requires a steady, rhythmical touch. The small 0.8 mm beads are then polished by hand using a brush coated with diamond paste. The effect must be regular, while maintaining the personal deft touch that gives life to the result thanks to similar yet unique reflections. This beaded or ‘pearl’ decoration that was particularly in vogue in the early 20th century requires peerless mastery and dexterity.

Like an extension of this delicate craftsmanship performed on the case middle, the bow is a work of art in itself with its two roaring lions. At the client’s request, these three-dimensional ronde bosse sculptures are inspired by classical statues. Incredibly realistic, sculpted in a block of gold, they embody a rare degree of mastery.

Before working the material in its raw state, the Vacheron Constantin engraver made several 3D prints to determine the right volumes that would enable her to express her art. To craft the lions’ heads, which are similar yet not identical in terms of their manes, she drew with a tracing point the outlines of the two profiles, from the front and from above. It is above all a question of understanding the volumes of the head in three dimensions, before starting the sculpture, which gradually makes her lose the previously traced reference points.

The head of the animal must be imprinted in her mind as an infallible reference point throughout the process in order to give it life and character. Observation and precision are essential in creating such an animal sculpture whose expression can be totally distorted by an excessively strong touch.

The engraver first used a milling cutter to rough out the material and then several burins for increasingly fine and accurate work. The details of the satin-brushed, matt and polished textures were obtained using specific tools, some created for the occasion. A total of five months of extremely meticulous craftsmanship was required to engrave and sculpt the various elements of the pocket watch.

In the interests of safety, particular attention was paid to the design of the hinged officer-type caseback. An internal mechanism inside the case facilitates access by enabling the user to half-open the caseback by pressing the crown-integrated pusher. A cone-shaped titanium pin serves as the hinge, concealed by gold screws, while a spring using approximately 90° of the case angle slows down the closing of the enamelled and engraved caseback.

The extraordinary length of the hands – the minutes hand is 35 mm long – is also a challenge, particularly when it comes to finishing the polished surfaces and ensuring an even surface. To enhance lightness, they are made of pfinodal, an alloy of copper, nickel and tin, and then gilded.

Technical details

Model: Les Cabinotiers Westminster Sonnerie –Tribute to Johannes Vermeer
Reference 9910C/000J-B413

Movement
Calibre 3761
Developed and crafted by Vacheron Constantin
Mechanical manual winding
71 mm (31 ½’’’) diameter, 17.05 mm thick
Movement power reserve: approximately 80h
Strikework power reserve (Grande Sonnerie mode): approximately 16 hours
2.5 Hz (18,000 vibrations/hour)
806 components
58 jewels
Hallmark of Geneva certified timepiece

Indications
Hours, minutes, small seconds
Tourbillon, minute repeater, Westminster carillon

Case
18K 3N yellow gold, engraved with acanthus leaves on the case sides and with tulips and “pearl” decor on the bezel and the caseback
Bow sculpted with two lion heads
Officer-type cover, Grand Feu miniature enamelling depicting Johannes Vermeer’s Girl with a Pearl Earring painting, handmade by Anita Porchet
98 mm diameter, 32.60 mm thick

Dial
Grand Feu eggshell-coloured enamelling
Blue enamelled numerals
Golden pfinodal hands

Presentation Box
Les Cabinotiers model exclusively developed for this timepiece

Rarity
Single-piece edition
“Les Cabinotiers“, “Pièce unique”, “AC” hallmark engraved on caseback

Christophe Claret Napoleon: Westminster Flying Tourbillon Minute Repeater with Jaquemart Automata

September 3, 2021 MasterHorologer

Independent Swiss luxury watch manufacture Christophe Claret pays homage to Napoleon Bonaparte on the occasion of the bicentenary of his death by producing an exceptional watch. The «Napoleon» is a Westminster flying tourbillon minute repeater provided with a jaquemart automata featuring Napoleon with his soldiers.

To pay tribute to the genius military strategist, a military campaign, entirely handmade miniature painting, is staged in the first painting of this series of unique pieces. The animated characters are embossed and enhanced with colors.

Napoleon, to reward his bravest soldiers, created, from the start of his reign, the Legion of Honor and his famous medal. Christophe Claret decided to put the exceptional symbol on the tourbillon cage of this timepiece.

The Westminster minute repeater mechanism plays a musical tune when the quarters ring. Each quarters has a different ringtone «C D E G; G D E C; E G D C. » This ringtone, resulting from a collaboration between Christophe Claret and a virtuoso violinist, offers notes with optimal quality.

This musical tone is accompanied by the animation of the stage automatons. The «Napoleon» is available in two limited editions of 8 pieces, an edition in Red Gold and an edition in Titanium. All unique, they are each differentiated by their decor.

Driven by NBC98 caliber, the Christophe Claret Napoleon sets the tone in the family of traditional complications watches, the first of the four collections of the brand. It is inspired by previous creations by the master watchmaker, while once again pushing the limits of what is possible in this area.

With a frequency of 3 hertz (21,600 vibrations per hour) by means of its flying tourbillon, the NBC98caliber comes to life thanks to a single barrel. The mechanism has a power reserve of around 60 hours. The activation of the minute repeater is traditionally made through a sliding pusher on the left side of the case. We can therefore contemplate the animation of the Jaquemart automata, while listening the melodious sound of time by the Westminster cathedral ringing.

Christophe Claret is the designer of this four-branch balance wheel which offers an inertia / weight ratio close to the ideal balance: although very complex to manufacture, this aerodynamic balance is easy to adjust and balance.

The «cathedral» stamps of Napoleon’s «Westminster» ringing have been the subject of special care -as always with Christophe Claret. This type of bell has the particularity of going around the movement twice in order to express sounds that are longer, clearer and more powerful. Excellence is required for their manufacture in drawn steel, for their assembly and tuning. They benefit from a patented in-house invention which blocks significant vibrations despite their exceptional lengths and thus prohibits all parasitic noises.

The case harmoniously combines the polished and satin finishes of 5N red gold or titanium, highlighting the play of lights.

Grade 5 titanium is hard and very difficult to machine, it has the advantage of being extremely light and above all of sublimating the transmission of the ringing sound. The dial also magnifies the light and dark, with its unique nuances of hues and personalized materials.

The Napoleon watch displays a handmade miniature painting of a different battle setting on each of the 8 unique pieces.

Technical details

Model: Christophe Claret Napoleon

Movement
Caliber NBC98, mechanical, hand-wound movement
Diameter: 37.00 mm
Height: 9.03mm (without hands)
Components: 511
Jewels: 36
Barrel: Single mainspring barrel
Power reserve: Approximately 60 hours
Escapement: Swiss lever
Frequency: 3 Hz (21’600 vph)
Flying tourbillon with cage bridge decorated with the Legion of Honor
Tourbillon rotates once every 60 seconds

Functions
Hours, minutes
Hours, quarters and minutes repeater on demand
Inertia wheel
4-note minute repeater playing Westminster chime
4-jaquemart automata animated when ringing

Operating devices
Slide to activate the minute repeater function
2-position crown
– Drawn: time setting
– Thrust: winding the movement

Case
Diameter: 47mm
Height: 15 mm
Water resistance: 3 ATM / 30 m / 100 ft

Editions

Christophe Claret Napoleon Titanium, MTR.NBC98

Case: Grade 5 titanium
Dial: hand painting
Hands: Steel
Crown: Grade 5 titanium
Strap: Embossed Vegetable leather
Edition: 8 unique pieces
Price: CHF 590’000(excluding taxes)

Christophe Claret Napoleon Red Gold, MTR.NBC98

Case: 5N red gold
Dial: hand painting
Hands: Gold
Crown: 5N red gold
Strap: Embossed Vegetable leather
Edition: 8 unique pieces
Price: CHF 590’000 (excluding taxes)

Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 (Quadriptyque)

May 8, 2021 MasterHorologer

During the Watches and Wonders 2021 digital event, Jaeger-LeCoultre unveiled Reverso Hybris Mechanica Calibre 185 (Quadriptyque), the world’s first watch with four faces. This grand complication watch incorporates a total of 11 complications, including perpetual calendar, minute repeater, indications of the synodic, draconic and anomalistic cycles (never before presented together in a wristwatch), requiring 12 patents.

The most complicated timepiece ever presented in the Reverso collection, the Reverso Hybris Mechanica Calibre 185 is the result of over six years of development, combining key areas of expertise at Jaeger-LeCoultre with innovative new astronomical indications.

Uniting the brand’s unchallenged mastery of chiming watches, precision mechanisms, astronomical complications and ultra-compact watchmaking, it is the world’s first wristwatch with four functioning display faces. It incorporates three displays of lunar information on the interior face of the iconic Reverso cradle: the synodic cycle, the draconic cycle and the anomalistic cycle.

With these functions, the Hybris Mechanica Quadriptyque can predict the next global incidence of astronomical events such as supermoons and eclipses — the world’s first wristwatch to provide such astronomical indications.

Having a multitude of complications in a watch is pointless unless they can be legibly and comprehensibly displayed, and the watch can be reasonably worn. Liberated by the unique design of the iconic Reverso, Jaeger-LeCoultre has created a world’s first: a double-faced case continuously driven by the in-house Calibre 185, and a double-faced cradle with indications synced and updated by the primary movement every day at the stroke of midnight by an ingenious mechanical system proprietary to Jaeger-LeCoultre.

If accomplished through conventional mechanical means, the 11 complications of the Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 Quadriptyque would result in a timepiece far more suited for a desk than a wrist. Thanks to nearly two centuries of expertise and a thoroughly modern approach to innovation, the Maison has accommodated the extremely complex mechanism in a wristwatch with a 51mm x 31mm x 15mm case.

The history of Jaeger-LeCoultre is rooted in the pursuit and attainment of precision. One of the earliest inventions of founder Antoine LeCoultre was the millionometer, the first instrument able to measure the micron.

Today, Jaeger-LeCoultre is an undisputed pioneer and leader in creating exceptional executions of the tourbillon, a mechanism designed to enhance the chronometric performance of a timepiece. The Reverso Hybris Mechanica Gyrotourbillon 2 (2008) stunned audiences and won chronometry awards with its multi-axial revolving balance, and the Reverso Hybris Mechanica à Triptyque (2006) remains unique in its use of a tourbillon with a high-precision ellipse isometer escapement.

Occupying the 7 o’clock position on the recto face of the case, a flying tourbillon makes one rotation a minute, continuously varying the position of the balance in order to achieve a single corrected average time measurement.

The balance beats in regular cadences of 4Hz (28,800vph), every eight beats mark the passing of one second. The seconds accumulate into minutes, into hours, days, weeks, months and years. The recto face of the Quadriptyque case shows the indications of a perpetual calendar. It also takes leap years into account, displaying a 29th day in the month of February every four years.

Highlighting the precision of the Jaeger-LeCoultre Calibre 185 construction, the perpetual calendar indications are instantaneous, changing at the stroke of midnight. In addition, the complexities of the Calibre 185 construction required the date to be displayed at the 5 o’clock position on the dial. At Jaeger-LeCoultre, only the perfect legibility of a grande date was considered acceptable for a watch of such prestige, which necessitated the creation of a new system of date display discs in order to accommodate the dimensions of the flying tourbillon at 7 o’clock.

There are extremely few watchmaking manufactures that possess in-house expertise in sonnerie wristwatches. Jaeger-LeCoultre is the only one watchmaking manufacture that has over 200 chiming watch calibres in its historical and modern inventory. The verso face of the Quadriptyque case is a virtuoso tour de force of Jaeger-LeCoultre’s patrimony as a master and innovator of chiming watches.

With the slide of a lever located just above the crown, the Quadriptyque unleashes its melody. First, a series of low notes, correlating to the number of hours. Second, an alternating couplet of high and low notes, corresponding to the quarter-hours. And concluding the melody, a succession of high notes, indicating the number of minutes to be added to the elapsed quarters. In concert, the hours-quarters-minutes chime plays the current time in musical code.

The striking works of the Reverso Quadriptyque are completely exposed alongside a secondary time display, indicating the same time as the recto dial, but in a jumping-hours and peripheral-minutes format. As the Quadriptyque strikes the time, setting a symphony of springs, cams, hammers and gongs into motion, their acoustic report confirms the visual display of the secondary dial.

Visible through apertures on the movement plate hand-decorated with the guillochage motif known as clous de Paris are elements of the chiming mechanism uniquely associated with the sonnerie expertise of Jaeger-LeCoultre. These include the silent chime governor, patented by the manufacture in 1895 to eliminate the buzzing noise created by the older anchor system.

More recent in-house innovations showcased in the Quadriptyque are the crystal gongs (first seen in the Master Minute Repeater Antoine LeCoultre of 2005) that attach the repeater gongs directly to the sapphire crystal to exploit the material’s optimal acoustic properties, the square cross-sectional profile of the gongs themselves that maximise contact and energy transmission between the hammers and gongs (a mainstay of Jaeger-LeCoultre’s repeating watches since 2006), and the articulated trebuchet hammers (developed for the 2009 Hybris Mechanica Duomètre à Grande Sonnerie) that deliver a clean and strong strike to the gongs. In totality, these innovations allow Jaeger-LeCoultre minute repeaters to produce some of the loudest and clearest chiming wristwatches today.

Debuting in the Reverso Hybris Mechanica Calibre 185 is a completely novel engineering of the chiming components to create a seamless chime with no pauses in between the hours, quarters and minutes. The conventional minute repeater mechanism utilises special pivoting racks that read the time off a series of cams and then proceed to activate each group of chimed notes in turn. This often results in silent gaps between the groups of chimed notes, especially when there are only hours and minutes to be struck, with no intervening quarters.

The Hybris Mechanica Master Ultra Thin Minute Repeater Flying Tourbillon (2014) and Master Grande Tradition Gyrotourbillon Westminster Perpétuel (2019) made exceptional strides in chiming know-how by reducing these silent gaps, but the Reverso Quadriptyque has reached the ultimate stage of expertise in this area. By refining and inverting specific steps in this mechanical sequence, the Quadriptyque has succeeded in eliminating these gaps entirely.

As a watch manufacture with close to two centuries of fine watchmaking expertise, Jaeger-LeCoultre has mastered all aspects of time expression, from the quotidian to the esoteric. One of the hallmark complications of Jaeger-LeCoultre is the display of sidereal time, time that is determined with reference to the stars instead of the Sun, first presented in the Master Grande Tradition Grande Complication (2010).

This year, for the first time ever in the history of mechanical horology, Jaeger-LeCoultre unites three displays of lunar information — the synodic cycle, the draconic cycle and the anomalistic cycle — in a single wristwatch. This unique micromechanical combination of indications, located on the interior face of the cradle of the Reverso Hybris Mechanica Calibre 185, allows the determination of eclipse events (both solar and lunar) and rare lunar phenomena such as supermoons.

Occupying the top half of the interior face of the cradle of the Reverso Quadriptyque is a massive representation of the phases of the moon in the Northern Hemisphere. A laser-engraved moon is progressively covered and revealed by a mobile blue lacquer disc with gold glitter décor, corresponding to the age of the moon in the synodic cycle. While conventional displays of the moon phase accumulate one day of error after 32.5 months, the moon phase display of the Quadriptyque requires only one adjustment after 1,111 years.

Just below the moon phase display, on the left, is a counter with a three-dimensional micro-sculpted pink-gold sun orbited by a tiny hemispherical moon. This counter shows the draconic cycle, showing when the path of the Moon intersects with the orbit of the Earth around the Sun (known as the ecliptic). Such an intersection takes place twice in each cycle, indicated by the horizontal alignment on the counter of the moon and the sun.

At this time, the Moon, Earth and Sun are all on the same plane; however, they may not be aligned. For them to be aligned, a phenomenon known as syzygy, an additional condition must be fulfilled — the Moon must be either in its new or full phase. When that happens, an eclipse event happens on Earth, either a lunar eclipse if the Moon is in its full phase, or a solar eclipse if the Moon is in its new phase. However, the actual visibility of the eclipse is dependent on various factors such as the geographical position of the viewer.

To the right of the draconic cycle counter is a domed representation of the Earth, micro-painted in enamel, with a hemispherical moon in eccentric orbit around it. This counter represents the anomalistic cycle, showing the varying distance between the Earth and Moon. At its apogee, the Moon is at its furthest distance from the Earth and is closest at its perigee. When the Moon is in its full phase near or at the perigee, an event known as a supermoon occurs, in which the Moon can appear to be up to 14 percent larger than usual in the sky.

The display of the synodic, draconic and anomalistic cycle together in a wristwatch is unprecedented in horology, with the latter two indications protected by patent, making the Reverso Hybris Mechanica Calibre 185 the only watch ever made to provide such depth of information about astronomical phenomena.

The Hybris Mechanica family of timepieces at Jaeger-LeCoultre began with the 2003 Atmos Mystérieuse and has since grown to encompass close to 20 groundbreaking horological creations, including the Master Hybris Mechanica Gyrotourbillon 1 (2004), the Reverso Hybris Mechanica Grande Complication à Triptyque (2006), the Master Ultra Thin Minute Repeater Flying Tourbillon (2014) and the Master Grande Tradition Gyrotourbillon Westminster Perpétuel (2019).

The Jaeger-LeCoultre Reverso was born in 1931. The original Reverso bore a single time-telling face, with a mobile case that could be turned over within its cradle, revealing a solid caseback. The next generation of the Reverso featured another dial on its caseback, either in a different design to accommodate the wearer’s aesthetic preference (Duetto) or displaying a second time zone (Duoface) to offer additional functionality when travelling. The Reverso Hybris Mechanica à Triptyque (2006) represented an evolutionary leap in horological innovation, with a third display positioned on the interior face of the Reverso cradle.

This year, the world’s first wristwatch with four faces premieres in the form of the Reverso Hybris Mechanica Calibre 185 (Quadriptyque), the ultimate expression of the Reverso concept. On the last face of the Quadriptyque, the exterior face of the cradle, a representation of the phases of the Moon in the Southern Hemisphere is shown.

Most indications of the moon phase are of the Northern Hemisphere perspective, and the Quadriptyque’s display of the Southern Hemisphere moon phase on its fourth face is the fulfilment of the Reverso’s fundamental dualism. A star-flecked sky chart, engraved and lacquered in a gradient of blue shades forms the backdrop to the pink-gold moon, all of which are created in the Atelier des Métiers Rares® of Jaeger-LeCoultre.

The secret to the Reverso Hybris Mechanica Quadriptyque’s four functioning display faces lies in a solution first used in the 2006 Reverso Hybris Mechanca Grande Complication à Triptyque. Every day at midnight, a pin extends out of the main case movement to activate a mechanical corrector in the cradle, which then advances the cradle displays.

The mechanism driving the cradle displays is set directly into the cradle itself, without any additional movement plates that would increase the thickness of the watch. Jaeger-LeCoultre’s expertise in ultra-compact watchmaking makes the Quadriptyque, despite its multiple indications and complications, one of the most wearable high-complication watches of our time.

The Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 comes in an exceptional presentation box with a built-in mechanism that allows the wearer to quickly and intuitively set all the calendar and astronomical displays of the watch after a period of being unworn.

A two-position crown on the side of the box is used to first set the number of days that have elapsed since the watch was last worn. With the Quadriptyque set within the correction support frame, the box corrector crown can then be extended to its second position and wound to rapidly bring the watch to the current date for all calendar and astronomical indications. There is no risk of overcorrecting the watch or damaging the movement, since the entire process is controlled by the box corrector mechanism.

Technical details

Model: Reverso Hybris Mechanica Calibre 185
Reference: Q7103420

Case
Material: White gold
Case dimensions: 51.2 x 31 mm
Thickness: 15.15 mm
Water resistance: 30 metres

Movement
Manually wound Jaeger-LeCoultre Calibre 185
Power reserve: 50 hours

Functions
Face 1: Hour – Minute, Tourbillon (indicating the Second), Instantaneous Perpetual Calendar, Grande Date, Day, Month, Leap Year, Night & Day
Face 2: Jumping Digital Hour, Minute, Minute Repeater (with system avoiding dead time)
Face 3: Northern Hemisphere Moon Phase, Draconic Lunar Cycle (height of the moon), Anomalistic Lunar Cycle (apogee and perigee), Month, Year
Face 4: Southern Hemisphere Moon Phase

Strap
Blue alligator

Edition
Limited edition of 10 pieces

Vacheron Constantin Les Cabinotiers Minute Repeater Tourbillon Sky Chart Leo Constellation Jewellery

April 14, 2021 MasterHorologer

Vacheron Constantin presents the Les Cabinotiers minute repeater tourbillon sky chart Leo constellation Jewellery watch, a single-piece edition adding an artistic dimension to the technical prowess of its Calibre 2755 TMRCC. The Manufacture’s craftsmen, gemsetters and guilloché specialists have adorned an extraordinarily complex timepiece with a creative and original evocation of the Leo constellation.

This new model, presented at Watches & Wonders 2021, is part of the theme of the Maison for 2021: entitled Classic with a Twist, it highlights Vacheron Constantin’s creative energy, guided by an identity that celebrates a heritage and dares to deliver the unexpected.

Early astronomers’ observations led them to recognise animal forms in the configuration of the constellations, including that of a lion. Vacheron Constantin’s artisan drew inspiration from this to highlight the astronomical complication of this single-piece edition Les Cabinotiers watch.

Hand-guilloché and set with diamonds forming the Leo constellation, the noble creature stands majestically on the dial, framed by a case set with baguette-cut sapphires. This artistic and artisanal interpretation adds an artistic dimension to the technical prowess of Calibre 2755 TMRCC, which combines a tourbillon regulating device, a minute repeater in the grand tradition of the Maison’s striking watches, as well as a rotating sky chart.

The watch flaunts its elegance in an 18K white gold case measuring 45 mm in diameter and barely 15.1 mm thick, fitted with a dark blue alligator strap secured by a gemset gold buckle.

Already accentuated by the presence of a tourbillon, the complexity of the Les Cabinotiers minute repeater tourbillon sky chart Leo constellation Jewellery watch is further heightened by the mobile representation of the sky chart on the back of the watch. This vision of the constellations inspired the motif adorning the guilloche opaline dark blue dial, itself enhanced by the sparkling case adorned with 100 baguette-cut sapphires bezel-set on the lugs, crown and bezel.

The Leo constellation is staged to great effect on the dial. A masterpiece of hand guilloché craftsmanship created in the Vacheron Constantin workshops, the feline’s silhouette is composed of a multitude of triangles bearing their own motifs.

Since the rose engines operated by skilled artisans with an artist’s touch are designed to engrave decorative elements that are generally circular and geometric, it is easy to grasp the difficulties implied by depicting a lion in the form of a combination of polygons whose linear engravings provide striking depth effects. The stars composing the constellation are represented by brilliant-cut diamonds adorning the great cat’s tawny coat.

The 413-component Calibre 2755 TMRCC of the Les Cabinotiers minute repeater tourbillon sky chart Leo constellation Jewellery watch combines three horological complications in the technical, astronomical and musical categories.

This manual-winding movement with a 58-hour power reserve is equipped with a one-minute tourbillon bearing the small seconds hand. Invented at the beginning of the 19th century, this device – which incorporates the escapement as well as the balance-and-spring assembly within a mobile carriage – is designed to compensate for the effects of the Earth’s gravity on the regulator’s isochronism, thereby enhancing its precision.

This tourbillon is distinguished by its carriage shaped like a Maltese cross – Vacheron Constantin’s signature emblem since 1880 – and featuring a bar on which the delicate finishing operations involving manual chamfering and polishing require a full 36 hours of work.

Displayed through the back of the watch on a concave dial designed to accentuate the depth effect, the sky chart offers a striking view of the Milky Way and the constellations that appear in real time, as if through a telescope.

For the sake of accuracy, this sky chart performs a complete rotation in one sidereal day. Taking a fixed star in the sky as a reference point, the time required by the Earth to complete a full 360° rotation, or sidereal day, is exactly 23 h 56 min 4 s. Since the Earth rotates both within itself and around the Sun, it takes about four minutes less than on a calendar day to find its point of origin in relation to the given star.

This sidereal time can be read off counter-clockwise on the 24-hour circle, graduated in 10-minute increments, opposite the current date appearing on a rotating disc with a five by five-day scale. This display is essential for correctly adjusting the sky chart moving beneath the sapphire crystal. The sapphire crystal also bears an off-centred ellipse serving to highlight the exact position of the constellations in the Northern hemisphere at the moment the watch is consulted.

The watch is also equipped with a minute repeater enabling the hours, quarters and minutes to be chimed on demand. To create this particularly complex striking mechanism, controlled by a slide-piece housed in the case middle, Vacheron Constantin’s engineers and watchmakers were inspired by the work carried out on the 2005 La Tour de l’Île watch, and in particular its centripetal strike governor.

This silent system makes it possible to perfectly regulate the duration of musical sequences in order to obtain a distinct and harmonious sound of the notes played for the hours, quarters and minutes by the hammers striking two circular gongs.

Each year, the Les Cabinotiers department unveils a range of single-piece editions relating to a theme cherished by Vacheron Constantin. The year 2021 is dedicated to “Celestial Time”, with timepieces referring to the astronomical origins of time measurement.

In the Vacheron Constantin universe, Les Cabinotiers represents a department in its own right dedicated to the personalisation of Grand Complication models and single-piece editions. This tradition dates back to the 18th century, an age when master-watchmakers were called “cabinotiers” and worked in ateliers bathed in natural light, known as cabinets and located on the top floors of Geneva’s buildings.

In the hands of these learned artisans, open to the new ideas of the Enlightenment, exceptional timepieces were born, inspired by astronomy, mechanical engineering and the arts. This expertise, which constitutes the great Geneva watchmaking tradition, has been flowing through Vacheron Constantin’s veins since 1755.

Technical details

Model: Les Cabinotiers Minute repeater tourbillon sky chart Leo constellation Jewellery
Reference 9737C/000G-005C

Movement
Calibre 2755 TMRCC
Developed and manufactured by Vacheron Constantin
Mechanical manual winding
33.90 mm (14¾’’’) diameter, 9.40 mm thick
Movement power reserve: approximately 58h
2.5 Hz (18,000 vibrations/hour)
413 components
38 jewels
Hallmark of Geneva certified timepiece

Indications
Hours, minutes
Small seconds at 6 o’clock on tourbillon carriage
Tourbillon
Minute repeater
Sky chart

Case
18K white gold, set with 60 baguette-cut sapphires on the bezel (approx. 3.8 cts), 24 baguette-cut sapphires on case sides (approx. 1.9 cts) and 16 baguette-cut sapphires on lugs (approx. 0.3 ct.)
45 mm diameter, 15.10 mm thick

Dials (front & back)
18K white gold, opaline dark blue dial, Leo constellation hand-guilloché
9 brilliant-cut diamonds as hour-markers (approx. 0.03 ct)
18k white gold hands

Strap
Dark blue Mississippiensis alligator leather with alligator leather inner shell, hand-stitched, saddle-finish, large square scales
18K white gold pin buckle set with 16 baguette-cut sapphires (approx. 1 ct)
18k white gold folding clasp set with 16 baguette-cut sapphires (approx. 1.10 cts)

Presentation box
Les Cabinotiers model

Edition
Unique piece
“Les Cabinotiers”, “Pièce unique”, “AC” hallmark engraved on caseback

Carl F. Bucherer Manero Minute Repeater Symphony

April 13, 2021 MasterHorologer

Premiered during Watches and Wonders 2021, the Manero Minute Repeater Symphony is the most extraordinary timepiece Carl F. Bucherer has created in a long and impressive history that can be traced back to 1888.

The COSC-certified chronometer takes peripheral technology to places no watch brand has ever been before, with three peripheral movement elements – the rotor, the regulator, and a remarkable tourbillon that appears to float freely – developed in-house and patented by Carl F. Bucherer.

Not only does the Manero Minute Repeater Symphony´s MR3000 manufacture movement have a peripheral winding system and a peripherally suspended floating tourbillon, it also features a minute repeater with a peripherally mounted regulator.

This regulator, along with the peripheral winding system and the floating tourbillon, are patented by Carl F. Bucherer, and, together, these peripheral innovations combine to create a true horological symphony – a composition which, in fact, inspired the renowned Lucerne Festival Orchestra to honor it with a brilliant new opus.

The peripheral technology premiered with the peripheral rotor, patented by the brand in 2008, when this in-house manufactured caliber became the first movement ever to implement this principle successfully in series production.

Not only does the bidirectional automatic winding movement draw its energy from a peripherally rotating oscillating weight, its slim rotor also reveals the beauty of the movement. With the T3000 movement, which premiered in 2018, the manufacturer further extended its lead in peripheral technology when peripheral winding was combined with a groundbreaking Carl. F. Bucherer–patented transparent peripherally mounted tourbillon that appears to float.

As the heart of the Manero Minute Repeater Symphony, the elaborately finished and COSC-certified MR3000 manufacture movement with a power reserve of 65 hours has ushered in an exciting new era of peripheral technology.

The Manero Minute Repeater Symphony takes the classic minute repeater technique and puts this innovation to use in true Carl F. Bucherer style. Its mechanism is finely orchestrated to produce two different tones on two gongs which, along with the sculpted hammers, can be admired, most unusually, through cut-outs at the edge of the dial.

They are complemented by openings at 5 and 7 o’clock, through which the work of the striking hammers can be observed. A window above 6 o’clock showcases the watch’s innovative regulator, which sets the beat of the chimes. This patented regulator is mounted peripherally via three low-friction ceramic ball bearings.

However, the minute repeater from Carl F. Bucherer scores not only with outstanding technology, but also with genuine functionality. A protective mechanism built into the movement prevents inadvertent misuse: visible via the discrete display at 9 o’clock, it indicates the current mode of the watch – a blue dot shows that the crown is pulled out, and a musical note lets the wearer know that the minute repeater function is activated.

Another safety measure further ensures the protection of the watch: the crown cannot be pulled out when the repeater mechanism is running – it locks. Conversely, when the crown is pulled out, the repeater mechanism is locked.

The tourbillon – the classic complication originally designed by Abraham-Louis Breguet in the eighteenth century to offset the effects of gravity on the accuracy of the watch – is another sublime expression of the art and craft of watchmaking. And the watchmakers at Carl F. Bucherer have made this epitome of their craft float: the cage of their minute tourbillon is supported peripherally – and invisibly to the observer – by three ball bearings.

These frictionless ceramic ball bearings ensure stability and precise guidance. It is another ingenious technical feature on which Carl F. Bucherer also holds a patent. The tourbillon in the Manero Minute Repeater Symphony, which is proudly and prominently displayed at 12 o’clock, not only “floats”, but also stops on command: thanks to the stop-seconds function, the rotating cage is locked when the crown is pulled, allowing the time to be set to the second.

The Manero Minute Repeater Symphony has a 43.8 mm diameter case of 18-karat rose gold. Its open-worked and hand-angled lugs seductively follow the silhouette of the wrist.

These spoke-shaped horns reduce the mass of the case and thus amplify the watch’s melodious sound. The 18-karat white gold dial is hand-galvanized and features a fine grainé texture. 18-karat rose gold hands and hour markers reflect the warm hue of the case.

Connoisseurs of sophisticated watchmaking will appreciate the elaborate finishing: the carefully diamond-beveled and highly polished chamfers, the sandblasted crown, the hand-angled dial edges and windows, or the Geneva-striped, angled, and diamond-beveled bridges that can be seen through the sapphire crystal case back.

The individual numbering of the model, limited to 88 pieces, is engraved by hand on a small plaque in 18-karat gold at the 6 o’clock position on the dial. The watch is presented on a hand-stitched alligator leather strap whose every individual scale has been finished by hand. It is secured with an 18-karat rose gold folding clasp.

For those who wish to accentuate the unique character of this limited-edition masterpiece to create their very own symphony, Carl F. Bucherer offers further customization options. There are opportunities for the customer to choose from different designs and finishes, creating a personilsed timepiece.

Inside the Manero Minute Repeater Symphony´s luxury box is a stunning, specially designed resonator that will allow proud owners of this remarkable watch to share its unique music with their friends. The ingenious amplification system is meticulously crafted from spruce harvested from the forests in Switzerland’s Jura Mountains.

This spruce has long been regarded for its qualities as a tone wood and has been used for the tops of some of the world’s finest guitars, violins, and other stringed instruments. This unusual amplification system doubles the volume of the Manero Minute Repeater Symphony minute repetitions, making it easy to let others enjoy the phenomenon.

Not only do the celebrated Lucerne Festival Orchestra and Carl F. Bucherer share a hometown, but also a rich history and the common pursuit of excellence. Through the Manero Minute Repeater Symphony, these two prominent Lucerne natives have now found each other: inspired by the unmistakable sound of the minute repeater, the young Swedish composer Lisa Streich wrote the piece “PERIPHERY”, commissioned by Lucerne Festival. In addition to the watch’s unique striking mechanism, its three peripheral elements also play an important role in this intriguing musical composition.

Lisa Streich’s inspired piece takes core elements of the watch’s design and gives them voice for 2 minutes and 30 seconds. The Manero Minute Repeater Symphony is distinguished by its minute repeater and triple peripheral technology, so these components are represented musically by an imaginative combination of instruments and techniques. For example, the repeater function’s extremely mobile beat generator – its peripherally-mounted regulator – is reproduced by the striking and stroking of a triangle positioned vertically on a timpani.

The sounds of a violin bow drawn against the length the strings, breathing noises from the wind instruments, and the quirky drone of an instrument called a buzzing bow combine to express the complexity of the peripheral rotor. The floating tourbillon and its delicate cage find their counterpart in the brass section, whose players tap the bells of their horns with a pencil, triggering the wiping motion among the strings.

In doing so, the trumpet stimulates a response from the higher strings, and the trombone the lower ones; the exquisite choreography of the hands is recreated with a distinctive tick, tock, tick, tock.

Technical details

Model: Manero Minute Repeater Symphony
Reference number: 00.10925.03.63.01

Movement
Automatic with a 22 k rose gold oscillating weight, CFB MR3000 manufacture caliber, COSC-certified chronometer, diameter 35.70 mm, height 8.59 mm, 47 rubies, power reserve 65 hours

Functions
Minute repeater with two gongs, floating tourbillon, hour, minute, small seconds on tourbillon cage, stop-second, protection function for the mechanism

Case
18 k rose gold, domed sapphire crystal with anti-reflective coating on both sides, case back with sapphire crystal and anti-reflecting coating on both sides, water resistant to 10 m (1 bar), diameter 43.8 mm, height 12.47 mm.

Dial
18 k white gold Pd210 electroplated and grained pattern with 18 k rose gold hands and indexes

Strap
Dark brown Louisiana alligator leather, lining in dark brown Louisiana alligator leather, hand-stitched, 18k rose gold pin-lock folding clasp

Roger Dubuis Excalibur Diabolus in Machina (New Models in Pink Gold and DLC-coated Titanium)

March 8, 2021March 8, 2021 MasterHorologer

Roger Dubuis presents two new editions of its high complication watch, the Excalibur Diabolus in Machina. Now available in pink gold and DLC-coated titanium, this hyper horology creation incorporates a minute repeater, alongside the Geneva Maison’s signature flying tourbillon, as well as a double micro-rotor automatic system.

Its minute repeater chimes the tritone, the “Diabolus in Musica” chord outlawed in medieval religious music. The Excalibur Diabolus in Machina also features two other functions: a tone playback disc indicator and an “all or nothing” safety device.

The Excalibur Diabolus in Machina was introduced in 2020. The inaugural model features CarTech Micro-Melt BioDur CCMTM case.

The Excalibur Diabolus in Machina has a push-piece for activating a chime. The information on each cam is mechanically read off by the Minute Repeater’s main feeler-spindle system, which passes it on to the racks enabling the hammers to strike the gongs. The latter sounds a low pitch for the hours, a high pitch for the minutes, and two tones for the quarter hours, allowing the wearer to check the time at will. Consisting of three tones, or six semitones, the tritone – also known as the triad or the flatted fifth – an unsettling interval that does not conform to listeners’ expectations.

This distinctive dissonance was referred to in medieval times as “the devil’s chord” or diabolus in musica and strictly prohibited in religious compositions. It has nonetheless continued to play a crucial role in complex melodic harmony, notably appearing in Camille Saint-Saëns’ symphonic poem Danse Macabre and in the signature tune of the Black Sabbath metal band.

Cleverly shaking up the world of minute repeaters, Roger Dubuis has chosen the sound of the tritone as the chime of its Minute Repeater in the Diabolus in Machina. Pressing the minute repeater button between 9 and 10 o’clock activates the dissonant tonality – tuned to C and G flat – resounding through noble materials and providing a fascinating listening experience.

Various key technical advances featured in the Excalibur Diabolus in Machina include the Tone Playback Disc Indicator at 11 o’clock. Activating the Minute Repeater sets off the rotation of this disc – merged with a Roman numeral and bearing the words Hours, Quarters and Minutes. The result is a visually striking depiction of the time intervals being chimed.

An additional functional indicator further simplifies usage by showing whether the watch is in “manual winding” or “time setting” position. As well as enhancing the design through its artful integration at 4 o’clock, it plays a useful safety role in avoiding potential damage by warning the wearer not to adjust the watch while the Minute Repeater is chiming.

The “all or nothing” mechanism offers additional security by ensuring the minute repeater can be activated only once the pusher has been pressed all the way in. This eliminates the risk of harming the mechanism by inadvertent triggering, as well as facilitating comprehension of the chime by avoiding any partial and potentially confusing indications of time.

Roger Dubuis RD0107 Calibre — **RD0107 Calibre, Pink Gold Version**

The intricate complexities of this model are naturally heightened by Roger Dubuis’ typically bold decision to combine this fresh approach to the minute repeater with its signature flying tourbillon. Each of these two horological complications involves its own technical challenges and associating them within the same model is the kind of endeavour reserved for the most skilled and experienced master-watchmakers.

This Hallmark of Geneva-certified series powered by Calibre RD 107 is housed in an imposing 45 mm pink gold or DLC titanium-coated case and fitted with a calf leather strap designed for maximum comfort.

Technical details

Model: Excalibur Diabolus in Machina, RDDBEX0840

Case
Skeletonized, Ø45 mm, case, bezel and crown in pink gold
Case back in pink gold with sapphire crystal and anti-reflective treatment
Thickness: 16.8 mm
Water resistance: 5 BAR (50 m)

Dial
Grey double surface flange with engraved minute track, transfered texts
Polished and pink gold plated hour markers filled with SLN in the center

Movement
RD0107 Calibre: Mechanical automatic with minute repeater and single flying tourbillon
Features: Minute repeater and single flying tourbillon
Decorations: circular-grained or trued-up or shot-blasted or Cotes de Genève and NAC coated bridges and plate
Number of parts: 558 components
Jewels: 54 rubis
Diameter: 14 ¾’’’
Thickness: 10 mm
Frequency: 3 Hz (21’600 vph)
Power-reserve: 72 hours

Functions
Hours, Minutes, Minute repeater, function indicator, chiming indicator

Strap
Interchangeable 3D calf leather strap
Buckle: Interchangeable titanium cover with titanium triple folding buckle

Production
Unique series 1 of 1

Model: Excalibur Diabolus in Machina, RDDBEX0841

Case
Skeletonized, Ø45 mm, case, bezel and crown in black DLC Titanium
Case back in black DLC titanium with sapphire crystal and anti-reflective treatment
Thickness: 16.8 mm
Water resistance: 5 BAR (50 m)

Dial
Black double surface flange with engraved minute track, transfered texts
Polished and rhodium plated hour markers filled with SLN in the center

Functions
Hours, Minutes, Minute repeater, function indicator, chiming indicator

Strap
Interchangeable 3D calf leather strap
Buckle: Interchangeable black DLC titanium cover, titanium blades, triple folding buckle

Production
Unique series 1 of 1

H. Moser & Cie. Endeavour Concept Minute Repeater Tourbillon Titanium

February 1, 2021February 1, 2021 MasterHorologer

For the Endeavour Concept Minute Repeater Tourbillon, H. Moser & Cie. presents one of the most traditional watch complications and combines it with a magnificent flying tourbillon performing a spinning waltz. Two shaped chimes and the minute repeater hammers are resplendent against a dial featuring the newest colour in the H. Moser & Cie. catalogue, Electric Blue, intertwining with the tourbillon at 6 o’clock.

To develop the Endeavour Concept Minute Repeater Tourbillon, H. Moser & Cie. drew on the expertise of Timeless SA, a specialist in minute repeaters. Together, the two manufactures created a brand-new design, showcasing the beauty of the complication by positioning the chimes and the hammers on the dial side. This involved overcoming many technical challenges. In particular, the chimes (which are placed on one level to preserve the finesse of the piece) had to be curved so as not to interfere with the flying tourbillon and to respect H. Moser & Cie.’s main focus to keep the design understated.

In creating the movement and the case, significant effort has gone into ensuring elegant proportions. The sliding bolt, fitted on a Teflon runner to ensure it slides perfectly smoothly, is built into the main plate to save space. The case middle has been widened to the maximum in order to accommodate the movement while allowing enough space to create a soundbox. This amplifies the chiming of hours, quarter-hours and minutes by two gongs, onto which fall two hammers that are raised based on information provided by different feeler-spindles.

The geometry of the case has been meticulously designed, developed and adapted to maximise the properties of titanium and enhance its impact, amplifying the resonance chamber whilst allowing the essential walls to form part of the resonance. Titanium has a high elastic modulus, which means that this material deforms very little under stress and is consequently more rigid; its low density ensures that it is also lightweight, and it retains the vibratory energy from sound well, rather than allowing it to dissipate thanks to its low damping effect.

While ensuring the functioning of the minute repeater mechanism was already a complex technical feat, it also required perfect understanding of the subject to achieve a beautiful sound that combines amplitude, a certain length and a pure note.

Visible behind a skeletonised bridge, the dazzling one-minute flying tourbillon at 6 o’clock is fitted to a ball bearing that improves the accuracy and chronometry. The tourbillon appears to float weightlessly on the Electric Blue dial stripped of both logo and indices.

The strap, made from black alligator leather, adds the final touch of elegance to this high-complication timepiece.

Technical details

Model: Endeavour Concept Minute Repeater Tourbillon
Reference: 1903-0500, titanium model, Electric Blue dial, black alligator leather strap, limited edition of 20 pieces

Case
Titanium
Diameter: 43.0 mm/height: 14.0 mm
Sapphire crystal
Sliding bolt with runner made from Teflon
See-through sapphire crystal case back
Crown adorned with an “M”

Dial
Electric Blue with sunburst pattern
Hammers and chimes on dial side
Leaf-shaped hour and minute hands

Movement
Hand-wound HMC 903 calibre
Diameter: 33.0 mm/height: 9.62 mm
Frequency: 21,600 Vib/h
35 jewels
Power reserve: 90 hours
Double Moser stripes on the plate and bridges
Movement and components hand-finished and decorated
One-minute flying tourbillon at 6 o’clock with skeletonised bridge
Minute repeater

Functions
Hours and minutes
Minute repeater with hour, quarter-hour and minute chimes

Strap
Hand-stitched black alligator leather with red lining
Titanium pin buckle, engraved with the Moser logo

Roger Dubuis – Excalibur Diabolus in Machina Pink Gold and Excalibur Automatic Skeleton Pink Gold, Diamond Set

October 21, 2020 MasterHorologer

The Geneva based Luxury Swiss watch maker Roger Dubuis has unveiled two new watch models Mexico’s Salón Internacional Alta Relojería México (SIAR) horlogerie exhibition, which opened its doors on 20th October for a two day event.

The new two technically elaborate and extravagant pieces are the Excalibur Diabolus in Machina and the diamond-studded Excalibur Automatic Skeleton. Both timepieces are in pink gold.

Roger Dubuis Excalibur Diabolus in Machina

Styled in the iconic Excalibur case and flaunting a fascinating combination of matte and polished finishes, the 45 mm, one-off limited edition Excalibur Diabolus in Machina features two highly sophisticated complications: a Flying tourbillon with a minute repeater, accompanied by tone playback function indicators.

The epitome of the expressive singularity on which Roger Dubuis prides itself, the single tourbillon and the specific tritone sound of the minute repeater represent the highest standards of Haute Horlogerie and contemporary design.

The movement powering this high-complication timepiece is the RD0107 Calibre. It beats at 3 Hz (21’600 vph). Fitted with 54 rubies, this movement incorporates fine watchmaking finishes and decorations. This self-winding movement has a power reserve of 60 hours.

Excalibur Automatic Skeleton Diamond Set 42mm

With its trademark skeleton calibre flaunting the Maison’s unchallenged expertise in the realms of technical skill and creativity, the 42 mm Excalibur Automatic Skeleton is the quintessence of Roger Dubuis’ identity. In this latest ultra-contemporary reinterpretation of the iconic 820SQ calibre, sparkling diamonds adorn the case, lugs and the case middle.

The 820SQ calibre is a Poinçon de Genève certified, self-winding mechanical skeleton movement driven by a micro-rotor. This meticulously finished calibre features 35 jewels and beats at 4 Hz (28’800 vph). It has a power reserve of approximately 60 hours.

The watch is topped with a sapphire crystal glass. It also has a sapphire crystal caseback to observe the movement. Fitted with a 3D Pixel Camo rubber strap, this timepiece is available in a limited edition of 28 pieces.

Technical details

Model: Excalibur Diabolus in Machina
Reference RDDBEX0840

Case
Ø45 mm, case, bezel and crown in pink gold
Sapphire crystal with anti-reflective treatment
Case back in pink gold with sapphire crystal and anti-reflective treatment
Thickness: 16.8 mm
Water resistance: 3 BAR (30 m)

Dial
Double surface flange with engraved minute track, transferred texts
Hour markers filled with SLN

Strap
Interchangeable 3D calf leather strap
Buckle: Interchangeable pink gold cover with titanium triple folding buckle

Movement
RD0107 Calibre: Mechanical automatic with minute repeater and single flying tourbillon
Features: Minute repeater and single flying tourbillon
Decorations: circular-grained or trued-up or shot-blasted or Cotes de Genève bridges and plate with Rhodium or NAC coating
Number of parts: 558 components
Jewels: 54 rubies
Diameter: 14 ¾’’’
Thickness: 10 mm
Frequency: 3 Hz (21’600 vph)
Power-reserve: 60 hours
Poinçon de Genève certified

Functions
Hours, Minutes, Minute repeater, function indicator, chiming indicator

Production
Unique series 1 of 1

Model: Excalibur Automatic Skeleton
Reference: RDDBEX937

Case
Ø42 mm, pink gold case set with round diamonds on the lugs and on the side
Glass in sapphire crystal
Case back in pink gold
Thickness: 11.5 mm

Dial
Flange set with two rows of round diamonds
Total diamonds: 523 diamonds for 4.1 cts
Water resistance: 3 BAR (30 m)

Strap
3D Pixel Camo rubber strap
Buckle: Pink gold and cover set with round diamonds, double folding

Movement
RD820SQ Calibre automatic with micro-rotor
Features: Skeleton automatic with micro-rotor
Decorations: circular grained or trued-up plate and bridges with 5N gold coating
Number of parts: 166 components
Jewels: 35
Diameter: 37
Thickness: 6 mm
Frequency: 4 Hz (28’800 vph)
Power-reserve: 60 hours
Poinçon de Genève certified

Functions
Hours, Minutes

Production
Limited edition of 28 pieces

Hermès Arceau Pocket Aaaaargh!

September 29, 2020October 5, 2020 MasterHorologer

Hermès presents the Arceau Pocket Aaaaaargh!, a high-complication pocket watch created in co-operation with English artist Alice Shirley. It is the third timepiece born from the collaboration between the Swiss luxury watch brand and Alice Shirley. First two creations were the Slim of Hermes Grrrrr! & the Arceau Awooooo.

Hermes Arceau Pocket Aaaaargh!_cadran©Claude Joray — ©Claude Joray

After the gruff bear of the Slim of Hermes Grrrrr! and the wolf howling in the moonlight of the Arceau Awooooo, the Arceau Pocket Aaaaaargh! Watch highlights a tyrannosaurus aka T-Rex. On this new watch model, the «king of the tyrant lizards» with half-open jaws and an attentive eye comes to life under the expert guidance of Hermès watchmakers, after a month of meticulous work using exclusive techniques developed in its leather workshops.

The design of the tyrannosaurus, which appears to be peeking through a porthole, stands out against the cover and involves a combination of several demanding skills. The head and scales are made in leather mosaic: thousands of finely hand-cut multi-coloured leather fragments are applied one by one to faithfully reproduce the original pattern.

Hermes Arceau Pocket Aaaaargh!_cadran©Claude Joray (3) — **©Claude Joray**

The domed eye of the dinosaur, visible on both sides of the cover, is made of cabochon-cut Grand Feu enamel. Finally, the jaw and tongue are crafted in leather marquetry: fine tesserae are cut from various coloured leathers, previously thinned to just 0.5 mm, before being juxtaposed on the enamel base. Setting the final touch to this miniaturized leather artwork, a matt green alligator leather cord-strap is secured to the rectangular stirrup and accentuates the overall design.

Hermes Arceau Pocket Aaaaargh!_cadran©Claude Joray (4) — ©Claude Joray

This 48mm white gold pocket watch houses the Hermès H1924 manufacture self-winding movement equipped with minute repeater and flying tourbillion complications. Beats at 3Hz, it has a power reserve of 90 hours.

Technical details

Model: ARCEAU Pocket Aaaaargh!
Edition: One-of-a-kind creation

Movement
Manufacture Hermès H1924 movement
Mechanical self-winding movement, crafted in Switzerland
Diameter: 30mm
Thickness: 8.89mm
Power reserve: 90 hours
Frequency: 21,600 vph (3Hz)

Functions
Hours, minutes, minute repeater, flying tourbillion

Case
Shape/size: Round, 48 mm in diameter
Material: White gold case and cover
Watch glass: Anti-glare sapphire crystal and caseback
Caseback engraved with the inscription “Pièce unique”
Water resistance: 3 bar

Dial
White enamel on a white gold base

Cover
“Aaaaargh” marquetry and leather mosaic motif
Grand Feu enamel eye

Leather cord-strap
Medium – green alligator leather

Hermès Arceau Lift Tourbillon Répétition Minutes

September 5, 2020October 5, 2020 MasterHorologer

Hermès expands its iconic Arceau watch family by revealing a high-complication watch with flying tourbillon and minute repeater mechanisms.

The timeless silhouette of this Arceau watch takes the form of a round case with stirrup-like asymmetrical lugs. A one-of-a-kind model in rose or white gold, the Arceau Lift tourbillon répétition minutes features a white or Abyss blue-lacquered dial. A horse-shaped cut-out in the lacquered dial reveals the Hermès tourbillon and minute-repeater movement.

Framed by the equestrian profile cut-out hugging the curves of the case, the complexity of the double-gong minute-repeater mechanism is captivating. This traditional horological complication is combined here with another horological exception – the flying tourbillon – coiled inside the horse’s neck and visible through a round aperture at 6 o’clock.

Forming a double H, the architecture of the tourbillon is inspired by mot emblematic of the Hermès boutique on the Faubourg Saint-Honoré in Paris. This design crowning the tourbillon carriage and barrel bridge picks up the pattern of the artistic wrought ironwork adorning the entrance, railings, staircase and lift at the Parisian establishment.

The pleasing overall effect is swept over by slim open-worked hands and punctuated by the Arceau line’s characteristic sloping numerals that evoke a galloping horse.

Visible through the dial cut-outs and the sapphire crystal case-back, the new mechanical hand-wound movement H1924 from Manufacture Hermès emits the clear chime of its minute repeater from a white or rose gold case measuring 43 mm in diameter. Re-designed to incorporate two major Haute Horlogerie complications, this precious case was designed in the Hermès Horloger workshops, as were the lacquered dial and matt black alligator strap.

Technical details

Model: ARCEAU Lift tourbillon répétition minutes (Rose gold)

Edition
One-of-a-kind model

Movement
Manufacture Hermès H1924 movement
Mechanical hand-wound, crafted in Switzerland
Diameter: 30 mm (13 ¼ ‘’’)
Thickness: 6.1 mm
Power reserve: 90 hours
Frequency: 21,600 vph (3Hz)
Functions: Double gong, minute repeater, hours, minutes
Decoration: Mirror-polished tourbillon carriage topped with the Lift motif. Hand-chamfered and polished bridges
Distinctive feature: flying tourbillon

Case
Shape / dimensions: Round, 43 mm in diameter
Material: Rose gold
Crystal: Sapphire crystal and case-back with anti-glare treatment
Water resistance: 3 bar

Dial
White-lacquered dial
“Horse” cut-out motif

Strap
Havana alligator

Model: ARCEAU Lift tourbillon répétition minutes (White gold)

Edition
One-of-a-kind model

Case
Shape / dimensions: Round, 43 mm in diameter
Material: White gold
Crystal: Sapphire crystal and case-back with anti-glare treatment
Water resistance: 3 bar

Dial
Blue-lacquered dial
“Horse” cut-out motif

Strap
Abyss blue alligator

Patek Philippe Ref. 5303R-001 Minute Repeater Tourbillon

July 25, 2020 MasterHorologer

Introduced this year as a new member of the prestigious Geneva watch brand’s Grand Complications family, the new Ref. 5303 is the first Patek Philippe minute repeater with visible striking mechanism on the dial side.

The Ref. 5303 was unveiled in 2019 in a limited edition of 12 watches as a world debut on the occasion of the “Watch Art Grand Exhibition Singapore 2019”. The new slightly modified version of the Ref. 5303 Minute Repeater Tourbillon stands out with an eye-catching open-worked dial.

The repeater mechanism – for the first time with the hammers and gongs – can be admired in action without removing the watch from the wrist. Further, the back side of the tourbillon cage can be seen beneath the seconds sub-dial at 6 o’clock. In this wonderful work of art, the filigreed steel parts glisten against the backdrop of the rose gilt plate.

The aesthetic of the manually wound caliber R TO 27 PS was subtly reworked to emphasize its appeal. For instance, certain components were pierced, as is common for skeletonized movements. This movement also highlights Patek Philippe’s rich heritage in the manual finissage. The manufacture decorated the movement plate with Genevan circular graining, applied a delicate perlage to the recesses, and decorated the hammers with a circular satin finish.

The matchless rose-gold case sports a wide, cambered and polished bezel as well as white gold inlays with foliage engravings that grace the caseband and the strap lugs. The white-gold slide in the left-hand case flank that activates the minute repeater features the same motif.

The hour circle is black-lacquered sapphire-crystal rim with powdered rose-gold markers. The movement can be admired through the sapphire-crystal case back and is framed by a white gold rim. Its open-worked decoration echoes the case inlays and the repeater slide.

This finest example of the traditional watchmaking artistry is complemented with the unique sound that is typical of Patek Philippe repeater timepieces. As is the case for every Patek Philippe minute repeater, this melody of time is personally rated with great care by manufacture president Thierry Stern.

This year, Patek Philippe has also added a reinterpretation of the legendary Ref. 5370 Split-Seconds Chronograph and a redesigned edition of the classic Ref. 5270 Perpetual Calendar Chronograph into their Grand Complication collection.

Technical details

Model: Ref. 5303R-001 Minute Repeater Tourbillon

Movement
Caliber R TO 27 PS
Manually wound mechanical movement, minute repeater, tourbillon and subsidiary seconds
Diameter: 31.6 mm
Height: 8.35 mm
Number of parts: 356
Number of jewels: 29
Power reserve: Min. 40 hours, max. 48 hours
Frequency: 21,600 semi-oscillations per hour (3 Hz)
Balance: Gyromax®
Balance spring: Breguet
Balance spring stud: Adjustable
Functions: Two-position crown:
• Pushed in: To wind the watch
• Pulled out: To set the time
Displays: Center hour and minute hands; Subsidiary seconds at 6 o’clock
Activation of minute repeater: Slide in left-hand case flank
Hallmark: Patek Philippe Seal

Case
18K rose gold 5N with inlays in 18K white gold
Sapphire-crystal case back
Case protected against moisture and dust, not water-resistant
Case dimensions: Diameter: 42 mm
Height: 12.13 mm
Width between lugs: 20 mm

Dial
Hour circle in black-lacquered sapphire-crystal with white printed minute scale and powdered rose-gold markers
Leaf-shaped hour and minute hands in 18K white gold, pierced and lacquered in black
Subsidiary seconds with leaf-shaped hand in 18K rose gold 5NPage 6

Strap
Alligator leather with large square scales, hand-stitched, shiny black, fold-over clasp in 18K rose gold 5N

Panerai Radiomir 1940 Minute Repeater Carillon Tourbillon GMT – 49mm

October 4, 2016August 12, 2021 MasterHorologerLeave a comment

Equipped with the exclusive Tourbillon Regulator and the remarkable Double Minute Repeater Mechanism Chiming either local time or a second time zone, the Radiomir 1940 Minute Repeater Carillon Tourbillon GMT is technically the most complicated watch ever made by the Panerai Manufacture in Neuchâtel.

For the creation of the new Radiomir 1940 Minute Repeater Carillon Tourbillon GMT, Officine Panerai has sought inspiration from its own history – for over a century indissolubly linked to the world of the sea – and from the marine tradition of marking the passage of time by a ship’s bell. On sailing ships in particular, the striking of a bell played an essential part in life on board: it served to rouse the crew in the morning, to summon the sailors for meals and to indicate the end of each watch.

But it was also used to warn of danger, to convene an assembly or to indicate the presence of the ship to others when visibility was restricted by fog. This ancient tradition is invoked again today by the special tones of the chimes of this exceptional new Special Edition created by the Panerai Haute Horlogerie Manufacture in Neuchâtel.

Panerai Radiomir 1940 Minute Repeater Carillon Tourbillon GMT – 49mm, Reference: PAM00600

For the Radiomir 1940 Minute Repeater Carillon Tourbillon GMT Officine Panerai has developed the new P.2005/MR Manufacture movement, a hand-wound skeleton calibre fitted with a high-end minute repeater mechanism with distinctive technical characteristics, faithful to the philosophy of the brand of innovating by pursuing constructional simplicity which results in practical benefits and ease of operation.

The chiming is activated by a push-piece at 8 o’clock, and it is carried out by three hammers which strike an equal number of gongs fixed to the movement and the case. The choice of three hammers, instead of the traditional two, enables three different sounds to be combined, so that the carillon can play a melody, like that of a bell.

As is traditional, the first gong is the lowest and identifies the hour, while the last and highest indicates individual minutes. The unusual feature is that the second gong sounds triple chimes of an intermediate note, each triple chime corresponding to ten minutes instead of the traditional fifteen.

An example will help to describe the operation: in an ordinary repeater, the time of 10.28 is usually indicated by ten chimes for the hour, a different chime for the quarter of an hour and thirteen individual chimes for the minutes.

In Officine Panerai’s Minute Repeater Carillon, however, the sequence consists of ten chimes for the hour, then two triple chimes (the two ten-minute intervals) and eight single chimes. The system of tens, reducing the number of chimes, makes telling the time easier and quicker, and it also corresponds to customary way in which time is now indicated by digital watches.

The quality of the sound propagated by the minute repeater is also enhanced by the specificities of the red gold of which the case is made and by its structure, being formed of two parts created separately and then soldered together.

This construction enables the empty spaces inside the case to be optimised in order to enhance the quality of the sound. The hand work by master watchmakers gives the sound of each watch a unique character, similar yet imperceptibly different from each other.

The most remarkable feature of Officine Panerai’s Minute Repeater Carillon is the fact that the repeater function can be activated both for local time and for a second time zone, which is indicated on the dial by the central arrow hand and the am/pm indicator on the counter at 3 o’clock.

In this case too, the simplicity of selection and of activating what is, in essence, a double hour and minute repeater mechanism, is astonishing and the device is designed not to affect the safety of the movement.

To avoid accidental activation, the carillon can be operated by the push-piece at 8 o’clock only when the winding crown is rotated slightly.

The degree of rotation required is shown by a black indicator placed on the side of the crown: when the indicator can be seen from the front, the carillon cannot be sounded but, by a single pressure on the push-piece on the crown, the local time or the second time zone can be selected, and the red HT/LT (Home Time/ Local Time) indicator at 8 o’clock marks which of the two alternatives is in force.

As well as the minute repeater mechanism, the hand-wound P.2005/MR calibre, the result of four years of research and development by the Laboratorio di Idee in the Neuchâtel manufacture, also has the remarkable Panerai tourbillon regulator, which can be admired from both the front and the back of the watch thanks to the sophisticated work of skeletonisation.

In the system patented by Officine Panerai, the rotation of the tourbillon is different from that of the classic tourbillon. In the traditional version the balance cage rotates continuously on itself, cancelling out any variations caused by gravity and possible shocks. In the innovative Panerai mechanism, the tourbillon cage rotates on an axis which is perpendicular, not parallel, to that of the balance.

Also, while the rotation is once a minute in a traditional tourbillon, in the P.2005/MR it takes 30 seconds, and this is shown by an indicator which rotates in the small seconds counter at 9 o’clock. The greater speed and the particular arrangement of the mechanism enable it to compensate for any changes of rate very effectively, ensuring a very accurate precision timepiece.

The sophisticated work of skeletonising is helpful in providing better acoustic performance and it also enables the sophisticated technology of the P.2005/MR calibre and its fascinating details to be admired. All the elements which form the dial are directly mounted on the movement or on the flange, on which the words ‘RADIOMIR 1940 PANERAI’ and ‘MINUTE REPEATER CARILLON’ are engraved.

The little hammers of the minute repeaters and the two spring barrels, which store a power reserve of at least four days, are visible from the open back, through which the power reserve indicator mounted on the movement can also be read.

From the aesthetic point of view, the codes of the new Radiomir 1940 Minute Repeater Carillon Tourbillon GMT are the immediately recognisable ones of the Panerai style, such as the historic Radiomir 1940 case (49 mm in diameter) and the characteristic bar markers and figures covered with Super-LumiNova®.

The case is presented in 18 carat red gold, a metal of intense colour and excellent properties both in terms of resistance to corrosion – thanks to a percentage of platinum in the composition of the alloy – and in propagating the sound, with its particular hardness.

For this watch, realised as a Special Edition and only made to order for clients, Officine Panerai has anticipated the possibility of personalisation, which includes not only the choice of strap, of the hands or of other special features, but also the possibility of making the case in a material other than red gold.

Another essential element of a Panerai watch, even for an exceptionally complicated model such as the Radiomir 1940 Minute Repeater Carillon Tourbillon GMT (PAM00600), is water- resistance, in this case guaranteed to 3 bar (equivalent to a depth of about 30 metres).

Technical details

Model: Radiomir 1940 Minute Repeater Carillon Tourbillon GMT – 49mm
Reference: PAM00600

Movement
Hand-wound mechanical, P.2005/MR calibre
Hand-wound mechanical
16 ¼ lignes in diameter
Thickness 10.35 mm
59 jewels
28,800 alternations/hour
Incabloc® anti-shock device
Two spring barrels
633 components
Power reserve: 96 h (4 days)

Functions
Hours, minutes, small seconds, GMT 12/24 h, power reserve indicator on the back, local time and home time Minute Repeater for hours, 10 minutes and minutes, tourbillon

Case
49 mm, 18ct. polished red gold
Water resistance: 3 bar (~30 metres)

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Audemars Piguet Royal Oak Concept Acoustic Research

November 27, 2014July 14, 2021 MasterHorologerLeave a comment

Exceptional engineering and the power of sound merge in one of the most innovative concept watches created by a Swiss haute horlogerie watchmaking house.

The result of an in-depth eight-year sound research programme with three patents pending, this new Royal Oak Concept watch, a unique prototype, will be unveiled by Audemars Piguet at the Salon International de la Haute Horlogerie 2015 (SIHH) in Geneva.

Engineered within Audemars Piguet’s acoustic research lab, this new Royal Oak Concept is the first chiming watch so acoustically considered as to become a sound concept in its own right.

It has been sonically developed through an ongoing acoustic study programme in collaboration with the EPFL (EcolePolytechniqueFédérale de Lausanne) and it took three years to transfer that technological study into a watch concept. The result is scientifically defined sonic targets for watchmakers to measure and attain the ‘perfect’ minute repeater sound at a volume level never achieved before.

By applying the principles of stringed instrument making, Audemars Piguet has made a breakthrough in the acoustic quality of chiming watch technology and significantly enhanced sound transmission. In parallel, the Manufacture has innovated to overcome the necessary restrictions of water-resistance, which naturally dampens volume, with creative solutions increasing sound intensity.

Finally, to further improve sound perception, Audemars Piguet developed a new – almost silent – striking mechanism regulator. The result? The volume, pitch, tones and harmony of sound in a modern water-resistant minute repeater watch are all scientifically enhanced.

Audemars Piguet Royal Oak Concept Acoustic Research

For the first time in the history of chiming wristwatches, this timepiece isn’t a minute repeater simply meant for the confidential use of its wearer. Instead, its unique sound becomes a powerful experience to be shared.

The family-owned watchmaker took a passionate as well as a technological approach to the study programme, engaging a carefully chosen community of researchers, including watchmakers, artisans, technicians and academics.

The inner working of musical instruments was explored by a stringed instrument maker, an esteemed academic of the Geneva conservatory contributed on the subject of perceived sound, and an engineer from EPFL worked to improve sonic quality. Each added to the texture of the research programme, preventing it from becoming a simple academic exercise and highlighting sound as an expressive tool.

This new piece is a milestone in Audemars Piguet’s rich history of creating inventive, masterful and unique concepts: it breaks the rules of chiming watches by mastering sound.

Technical details

Model: Royal Oak Concept Acoustic Research

Movement
Hand-wound Manufacture movement with minute repeater, tourbillon and column-wheel chronograph
Total diameter: 29.90 mm (13 ¼ lignes)
Minimal guaranteed power reserve> 48 h
Frequency of balance wheel: 3 Hz (21,600 vibrations / hour)

Functions
Hours and minutes
Chronograph with central sweep-seconds hand, 30-minute counter (at 3 o’clock)
Minute Repeater

Case
Titanium case, Titanium bezel, titanium push piece guards
Diameter: 44 mm
Water Resistance: 20 m

Dial
Black dial, black counters, Royal Oak concept hands with luminescent coating

Strap
Black rubber with titanium folding buckle

AUDEMARS PIGUET Tradition Tourbillon Minute Repeater Chronograph Limited Edition

May 7, 2013July 14, 2021 MasterHorologerLeave a comment

AUDEMARS PIGUET, the legendary Swiss watch Manufacture based in Le Brassus unveils Tradition Tourbillon Minute Repeater Chronograph, a limited edition timepiece model equipped with complications and clothed in a case inspired by that of a 1920s cushion-shaped pocket watch belonging to its private museum.

Unveiled at SIHH 2013, the Tradition Tourbillon Minute Repeater Chronograph is produced in two 10-piece limited editions: one in pink and white gold, and the other in titanium and white gold.

The first version, featuring a pink gold case middle topped by a white gold bezel, associated with an anthracite dial, pink gold hands and hour-markers, lends the model an original and timeless charm. The other version with its titanium case middle and white gold bezel offers the wearer the best possible auditory experience when the minute repeater is in operation.

Few people are aware that the quality of the sound emitted by a watch largely depends on the metal from which the case is made, as well as its volume. The larger the case and the lighter and harder the materials, the more it enables the acoustic waves to expand. The 47 mm titanium case thereby maximises the sound volume, thus enhancing connoisseurs’ listening pleasure.

AUDEMARS PIGUET Tradition Tourbillon Minute Repeater Chronograph Limited Edition

In addition to its original design, this extraordinary instrument also houses an exceptional movement combining highly sought-after horological complications including a tourbillon regulator and a minute repeater mechanism. Assembled within a single mechanism and complemented by a chronograph function, they form a rare and outstanding whole.

The appealingly curved case of the Tradition Tourbillon Minute Repeater Chronograph accommodates a mechanical hand-wound 13 ¼-ligne (29.90 mm) calibre that is 7.65 mm thick and comprises 504 parts – of which some of the individual elements and mechanical subsets are visible through the transparent case-back.

Moreover, the 83 parts composing the one-minute rotating tourbillon with its balance oscillating at a rate of 21,600 vibrations per hour may be admired through the dial opening, thus enabling the owner of this fantastic instrument to revel in the sight of this 0.4 gram regulator of which the constant revolutions are designed to enhance the precision of the watch.

This exceptional timepiece is also superbly crafted by hand according to the highest Fine Watchmaking standards in order to reveal meticulously worked parts fully respectful of tradition.

The patient finishing work, to which specialised artisans devote hundreds of hours, is clearly visible through the transparent case-back. Finishes such as bevelling, recesses, sinks and sandblasting are required countless hours of fine craftsmanship and incredible dexterity, in a process amounting to around one-third of the price of the movement.

Among the techniques used to make this movement visually appealing, bevelling is undoubtedly the most highly appreciated manual technique, as well as that which requires the greatest accuracy. This exercise, which calls for years of experience, consists in using a file to cut down the edges of components and in polishing them with a slightly curved burnisher, so as to highlight the rim by enabling the light to play across the bevels.

These finishes serve historically functional purpose, by protecting the movement against dust and humidity, and thus any risk of oxidation. Nonetheless, these finishes and decorations will only effectively magnify the beauty of the mechanism if the technique involved in this art is fully mastered.

In the case of this model, each part has been treated with infinite care. Some components, such as the hammers of the minute repeater striking mechanism which are visible through the case-back, combine two finishes entailing highly complex execution: a mirror polish that is so fine that artisans even joke among themselves that “a glance is enough to scratch it”; along with a bevelling featuring interior and external angles embodying the ultimate expression of the artist’s mastery.

These specific angles, which can be easily pinpointed in the mechanism, may be viewed as the secret signature of the artisan, and provide undeniable proof of the authenticity of a work performed by hand because no machine could possibly produce this type of finish.

Manufacture Audemars Piguet hand-wound Calibre 2874

These two intense and exceptional models, with their cases featuring a particularly distinctive design, share the same Manufacture Audemars Piguet hand-wound Calibre 2874, partially visible through the case-back and ensuring a 48-hour power reserve.

This watch interpreted in pink and white gold version fitted with an alligator strap is secured to the wrist by a pink gold folding clasp, while the titanium and white gold version of this Tradition watch comes with a white gold folding clasp.

Technical details

Model: Tradition Tourbillon Minute Repeater Chronograph

Movement
Proprietary Calibre 2874, hand-wound
Total diameter: 29.90 mm (13¼ lines)
Movement thickness: 7.65 mm
Number of jewels: 38
Number of parts: 504
Minimum guaranteed power reserve: 48 hrs
Cadence of the balance: 21,600 vph

Case
Titanium case (47 mm), glareproofed sapphire crystal and case-back, 18K white gold crown, bezel, pushpieces and case-back.

Dial
Silvered opaline dial, pink gold applied Arabic numerals and hands.

Functions
Tourbillon, chronograph, minute repeater striking on 2 gongs, hours, minutes, small seconds.

Specific Characteristics
Triple complication movement
Column-wheel chronograph mechanism
30-minute counter
Hand-finished bridges and mainplate
Hand-finished cut-out parts (polished bevels, straight-grained on top and matt surface underneath)

Strap
Hand-sewn black “large square scales” crocodile leather with 18K white gold AP folding clasp.

Reference
26564IC.OO.D002CR.01
10-piece limited edition

Manufacture Royale OPERA

January 14, 2011August 10, 2021 MasterHorologer2 Comments

Swiss luxury watch brand Manufacture Royale has announced that it will manufacture its first Opera model series after having unveiled it at the end of 2010. This high complication wristwatch incorporates tourbillon and minute repeater mechanisms.

Although the first few that were made remain unique pieces reserved for the art market and the manufacturing heritage, Opera now has 5 editions in series production (rose gold, yellow gold, white gold, bicolour gold, and platinum).

Each 100% Swiss-made collection piece is numbered, designed at the Vallorbe manufacturing site, and made strictly identical to the original work of art. With its very original mechanism, Opera is the first timepiece to combine a Minute Repeater and a Tourbillon providing a 108-hour power reserve.

The ultimate in luxury, each numbered Opera piece has a lifetime warranty from Manufacture Royale, and extra, separate clockwork parts for each piece are filed with the manufacturer’s notary along with assembly instructions.

Now that it is in series production, Manufacture Royale can offer the Opera timepiece (Répétition Minute Tourbillon) to many amateurs, enthusiasts, and collectors at a recommended retail price of 345,600 CHF (including all applicable taxes) through a select network of the world’s best retailers in the biggest cities.

It is important to note that technical research for waterproofing timepieces while providing optimum sound diffusion of the Répétition Minute has been accomplished, which now meets the needs of well-informed collectors that live in humid areas of the world, specifically in Asia.

Technical details

Model: Manufacture Royale OPERA

Case
Case materials and finishing:
Folding/unfolding case in patented 18 carat gray or rose gold. 3 sapphire crystals.
Moveable transparent back. Screws and axles in 18 carat gray or rose gold.
Assembled and polished entirely by hand
Individually numbered
Case dimensions: 50mm in diameter
Number of components: 60

Crown
– 18 carat rose gold. Polished and diamond encrusted
– Manufacture Royale logo hand-polished surface

Hands
Hours and minutes in hand-polished 18 carat rose gold.

Movement
Movement dimensions Height: 5.45 mm / Diameter: 32 mm
Number of components: 319
Number of rubies: 29
Power reserve: 108 hours
Frequency: 3Hz, 21,600 vibrations per hour
Plates: Brass with sunray brushing, polished angles
Bridges: Brass with sunray brushing, polished angles
Entirely hand finished
Bells/chimes: Hours in A / Minutes in C sharp

Tourbillon
– Escape wheel and anchors in silicon
– One rotation per minute

Gears: Counter gears and sound system NIHS 20-02
Balance: spring Flat
Balance: with screws

Functions
Hours, Minutes and Repeater (triggered by slide)

Strap
Hand sewn Mississippi alligator skin
Buckle: Hand-polished 18 carat rose and gray gold

Proposed versions

Opera Bi-Color Gold, References: OP50.0508P.1 and OP50.0805P.1

50mm, folding-unfolding case in 18k rose and white gold
3 sapphire crystals, Moveable transparent back
Brown alligator leather with 18k rose and white gold pin buckle

Opera White Gold, Ref. OP50.05P.1

50mm folding-unfolding case in 18k white gold
3 sapphire crystals, Moveable transparent back
Brown alligator leather with 18k white gold pin buckle

Opera Black Gold, REF. OP50.06P.1

50mm folding-unfolding case in black DLC-PVD coated white gold
3 sapphire crystals, Moveable transparent back
Black alligator leather strap with black DLC-PVD coated white gold pin buckle

Opera Yellow Gold, REF. OP50.07P.1

50mm folding-unfolding case in 18k yellow gold
3 sapphire crystals, Moveable transparent back
Brown alligator leather strap with 18k yellow gold pin buckle

Opera Rose Gold, REF. OP50.08P.1

50mm folding-unfolding case in 18k rose gold
3 sapphire crystals, Moveable transparent back
Brown alligator leather strap with 18k rose gold pin buckle

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Badollet Observatoire 1872 Minute Repeater

October 1, 2010July 18, 2020 MasterHorologer

The Badollet Observatoire 1872 Minute Repeater combines the rich horological heritage of the Badollet brand with resolutely contemporary technical sophistication and functionality.

In 1872, in order to improve the already renowned performances of the Geneva watchmaking business, the Classe d’Industrie et de Commerce de la Société des Arts entrusted the Geneva Observatory with supervising the chronometer rating competition. Badollet won the first edition of the Concours de l’Observatoire, intended to reward the accuracy of the best chronometer, with its pocket-watches sweeping the first three places.

Badollet, having played an active part in the watchmaking adventure from the 18th to the 20th centuries, wished to create a series of models linking the brand’s rich past to its current renewal and reflecting its respect for time-honoured values.

These Instruments of Time, named “Observatoire 1872”, combine a classic case with a shape evoking that of pocket-watches, and movements boasting a resolutely contemporary technical sophistication.

With the Observatoire 1872 Minute Repeater, Badollet houses one of the most intricate complications, the minute repeater, within a classic pocket-watch type construction, while endowing it with the technological breakthroughs characterising the brand renewal.

This understated and elegant Instrument of Time features a round 44 mm-diameter case with gentle shapes in 18-carat gold. Water-resistant to 30 metres, it is enhanced by a glare-proofed sapphire crystal glass and case-back.

Presented here with an open-worked opaline dial set with 72 diamonds and 12 sapphires, the Observatoire 1872 Minute Repeater, like all Badollet Instruments of Time, can be interpreted and customised according to personal wishes within the boundaries of technical feasibility. The rhodium-plated leaf-type hands can also be customised.

Clearly visible through the transparent case-back and dial opening, the meticulous finishing – bevelling, circular graining and Côtes de Genève – cleverly reveal the added value inherent to this Haute Horlogerie creation. The hammer, gongs and inertial flywheel of the minute repeater mechanism can be admired on the bridge side.

At the heart of this horological gem beats Calibre BAD1655, a mechanical hand-wound movement with tourbillon type Swiss lever escapement.

This Calibre combines two major complications of the watchmaking art: the flying tourbillon and the minute repeater, which is triggered by a dedicated sliding bolt at 9 o’clock.

Driven by the same concern for optimal functionality, the Observatoire 1972 Minute Repeater is distinguished by the exceptional clarity of the sound it emits. When the mechanism is activated, the time is audibly signalled by the hammers striking the appropriate gongs. These hammers sound the hours on the low-pitched gong, quarters by alternating between the low- and high-pitched gongs, and minutes on the high-pitched gong.

Moreover, its striking work is visible on the dial side, while the hammers, gongs and flying tourbillon can be viewed on the bridge side. The watch displays the hours and minutes, while the flying tourbillon carriage – enhanced by a bridge bearing the Badollet signature – performs one complete rotation that may be admired at 6 o’clock on the dial side.

Technical details

Model: The Observatoire 1872 Minute Repeater

Movement
Calibre BAD1655
Hand-wound movement
80-hour power reserve
Tourbillon visible on the dial side at 6 o’clock
Minute repeater with striking mechanism sliding bolt at 9 o’clock

Case
18-carat white gold
Cambered colourless sapphire crystal glare-proofed on both sides, ultra-hard surface treatment
Colourless glare-proofed sapphire crystal back 18-carat white gold crown
External diameter: 44 mm
Wristband lugs: 24 mm
Water-resistant to 30 metres

Dial
18-carat gold Opaline silver-coloured dial, set with 72 diamonds and 12 sapphires

Hands
Hours and minutes: leap type, blued steel

Strap
Safari alligator mississipieinsis leather, cut-padded, leather-lined, hand-sewn, saddle-stitched. Matt or shiny finish
Folding clasp in 18-carat white gold
Pin buckle in 18-carat white gold

ATELIERS DE MONACO Carré d’’Or Squelette Grand Tourbillon Repetition Minute

February 5, 2010July 16, 2021 MasterHorologerLeave a comment

Monaco based luxury watch maker ATELIERS DE MONACO unveils a fully in-house developed and manufactured Minute Repeater: Carré d’’Or Squelette Grand Tourbillon Répétition Minute TB-RM1.

With this latest invention, Ateliers deMonaco joins a very exclusive group of only a few watch makers in the world that have the ability to design and manufacture such a complication in-house.

Among others, the TB-RM1 has a square case with a hand cut open dial (skeleton), is water-resistant due to the special case construction around the activation mechanism within the 18K gold side panel (which consists of 55 components), has its own 18K speed regulation system to minimize unnecessary sound production and last but not least, the TB-RM1 movement is hand engraved on the front and back, a signature trademark of the brand.

The ATELIERS DE MONACO Carré d’’Or Squelette Grand Tourbillon Repetition Minute is made in a limited edition of only 8 pieces worldwide and comes in a special box that is designed as a resonance instrument.

Technical details

Model: Carré d’’Or Squelette Grand Tourbillon Repetition Minute

Movement
Grand Tourbillon Repetition Minute TB-RM1
Chiming hours, quarters and minutes on command
Speed regulation of minute repeater with 18K gold weights
Patented XP® 1 minute tourbillon
Manual winding
Power reserve 48 hours
Curved chamfered and unique 3 dimensional deMonaco engraving
Hand engraved sunbeam pattern carved into the main plate of the movement
Ruthenium (also called black gold) plated main plate
Silicium escape wheel and silicium lever
Alternances 28800 beats/hour (4 Hrz)
Custom made hand engraving on tourbillon cage
Sapphire tourbillon bridge

Functions
Hour, minutes, small seconds (6 o’clock)
Tourbillon Minute Repeater

Case
Dimensions 46 x 50 MM
Height 16 MM
7 main parts
55 parts overall.
Ultra light Titanium core
Curved shaped 18 K gold side panels
Integrated activation mechanism and titanium slide in 9 o’clock side panel
Brushed and polished by hand
Assembled by hand
See trough case back
Front and back sapphire crystal
Multi layered anti reflection coating on sapphire crystal
Hand engraved case back, secured with 4 gold screws
Water resistant up to 3 ATM

Dial
Roman skeleton dial cut out by hand
Diamond formed titanium hour markers applied on hour ring
6 o’clock tourbillon opening
Hands: Solid gold skeleton hands

Strap
ATELIERS DE MONACO personalised hand stitched alligator strap
18 K gold folding buckle, adjustable
Folding clasp lock finished with curved chamfered edges engraved ATELIERS DE MONACO

Grönefeld GTM-06 Tourbillon Minute Repeater

December 12, 2008July 30, 2021 MasterHorologer2 Comments

This chiming wristwatch, the most complicated wristwatch ever created in The Netherland’s history, is a so-called tourbillon with a minute repeater mechanism, able to sound the exact time on tiny gongs held within its case. In the world of horology this type of wristwatch represents the watchmaker’s Mount Everest in terms of the difficulties it contains, requiring more than 6 months of careful construction, assembly and regulation before completion.

The GTM-06 is the first in a line of wristwatches planned by the Oldenzaal based watchmakers Bart and Tim Grönefeld, who have spent 4 years of hard work before the realization of this new timepiece would become a reality.

With a contemporary and masculine look, the GTM-06 Tourbillon Minute Repeater wristwatch is available in a strictly limited edition of 10 pieces in 18 carat 4N gold and 10 in 950 platinum, priced at Euro 325,000 and 385,000 accordingly.

With its musical nature, utilizing miniature hammers and cathedral gongs to chime the hours, quarters and minutes as requested by the user, in combination with a tourbillon regulating device, the Grönefeld tourbillon minute repeater makes mechanical demands on watchmakers that go far beyond the majority of watches on offer today. Only a handful of watchmakers in the world, either inside or outside of Switzerland, are able to deal with horological creations comprising this type of extreme complexity.

The watch differs from other repeater wristwatches in a number of details. This is first and foremost a man’s repeater wristwatch, as one can see in its full bodied and forceful lines. But there is also an acoustic reason behind this design aspect, as the case volume allows the gongs to develop a full and pure sound. The lugs, which also convey the full outlines of the case to the special galuchat strap, appear to be straightforward but they are not.

Using specially developed micro-machining techniques invisible from the exterior, the lugs are specially channeled in order to allow the resonance of the case not to be dampened by their mass. This is the result of experiments and vast experience that both Tim and Bart developed in the course of years of work on minute repeater mechanisms, as well as careful listening and tuning of the sounds the minute gongs produce. The GTM-06 also utilizes a Cathedral type gong that has a longer winding within the confines of the case, thus providing the fullest possible tone achievable.

The dial is formed by the beautifully finished movement itself, decorated with Geneva stripes, perlage, anglage and perfectly polished screws, hands, indexes and springs. Black polish, the most impossibly demanding and difficult ‘dark art’ of fine finishing found only in the most expensive watches, is used extensively throughout the movement.

Even those areas never to be seen by the user are given exquisite finishing on a level that has become increasing rare in the world of haute horlogerie today. The modern styled chapter ring of black onyx is adorned with highly polished hour indexes that catch the light at every angle to provide a subtle and discrete view of the time. Only the fine finishing of the parts before assembly starts takes more than 2 months of intensive work in several stages to complete.

The watches will first be available with 18 carat rose gold cases, and shortly after with a minimal number available in 950 platinum during the first year. There are plans to develop a limited series stealth model in black DLC coated titanium during the course of 2009, and there are many short, medium and long-term plans to follow as the brand develops and grows.

The Grönefeld GTM-06 is delivered in an ultra high-end presentation box of unparalleled quality and design. The hand finished, black piano lacquer box contains two shelves, the uppermost a leather-lined tray with the watch, a comprehensive leather-bound instruction book, guarantee certificate and space for cuff links or other accoutrements. Below is a special, ventilated wooden tray for cigars.

Another level lower, one pushes on the engraved aircraft aluminum inlay with Grönefeld logo, and a secret drawer appears containing a Davidoff (Dupont) black lacquer gas lighter and two cigar cutters.

Discover more Grönefeld watches.

Find more details about Grönefeld watch brand and its history.

Technical details

Model: Les Cabinotiers Westminster Sonnerie –Tribute to Johannes Vermeer Reference 9910C/000J-B413

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Model: Christophe Claret Napoleon

Editions

Christophe Claret Napoleon Titanium, MTR.NBC98

Christophe Claret Napoleon Red Gold, MTR.NBC98

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Model: Reverso Hybris Mechanica Calibre 185 Reference: Q7103420

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Model: Les Cabinotiers Minute repeater tourbillon sky chart Leo constellation Jewellery Reference 9737C/000G-005C

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Model: Manero Minute Repeater Symphony Reference number: 00.10925.03.63.01

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Model: Excalibur Diabolus in Machina, RDDBEX0840

Model: Excalibur Diabolus in Machina, RDDBEX0841

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Roger Dubuis Excalibur Diabolus in Machina

Excalibur Automatic Skeleton Diamond Set 42mm

Technical details

Model: Excalibur Diabolus in Machina Reference RDDBEX0840

Model: Excalibur Automatic Skeleton Reference: RDDBEX937

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Technical details

Model: ARCEAU Pocket Aaaaargh! Edition: One-of-a-kind creation

Links

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Model: ARCEAU Lift tourbillon répétition minutes (Rose gold)

Model: ARCEAU Lift tourbillon répétition minutes (White gold)

Links

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Model: Ref. 5303R-001 Minute Repeater Tourbillon

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Model: Radiomir 1940 Minute Repeater Carillon Tourbillon GMT – 49mm Reference: PAM00600

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Model: Royal Oak Concept Acoustic Research

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Model: Tradition Tourbillon Minute Repeater Chronograph

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Technical details

Model: Manufacture Royale OPERA

Proposed versions

Opera Bi-Color Gold, References: OP50.0508P.1 and OP50.0805P.1

Opera White Gold, Ref. OP50.05P.1

Opera Black Gold, REF. OP50.06P.1

Opera Yellow Gold, REF. OP50.07P.1

Opera Rose Gold, REF. OP50.08P.1

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Technical details

Model: The Observatoire 1872 Minute Repeater

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Technical details

Model: Les Cabinotiers Westminster Sonnerie –Tribute to Johannes Vermeer
Reference 9910C/000J-B413

Model: Reverso Hybris Mechanica Calibre 185
Reference: Q7103420

Model: Les Cabinotiers Minute repeater tourbillon sky chart Leo constellation Jewellery
Reference 9737C/000G-005C

Model: Manero Minute Repeater Symphony
Reference number: 00.10925.03.63.01

Model: Excalibur Diabolus in Machina
Reference RDDBEX0840

Model: Excalibur Automatic Skeleton
Reference: RDDBEX937

Model: ARCEAU Pocket Aaaaargh!
Edition: One-of-a-kind creation

Model: Radiomir 1940 Minute Repeater Carillon Tourbillon GMT – 49mm
Reference: PAM00600