Double-Vé Racing Driver Limited Edition

Released in a numbered limited edition of 50 pieces, the Racing Driver is the second series of watches produced by the Fleurisanne brand Double-Vé.

Double-Vé Racing Driver Limited Edition

Introduced in 2020, this Robust, sporty and colorful watch stands has a blue dial with red and white details.

The 42 mm diameter case in 316L steel is fitted with a 4 mm thick sapphire crystal with anti-reflective treatment and a full blue unidirectional rotating fluted bezel with 120 clicks.

Double-Vé Racing Driver Limited Edition watch with full blue bezel and dial

Water-resistant to 200 meters, the Racing Driver model is also available with blue or black graduated bezel. For greater comfort and to add a touch of originality, the fluted screw-down crown is located at 4 o’clock.

Double-Vé Racing Driver Limited Edition watch

Enhanced with maximum luminescence, the blue dial of the Double-Vé Racing Driver watch was produced in Val-de-Travers. The anodized aluminum bezel insert was also produced in the region.

Double-Vé Racing Driver Limited Edition with blue graduated bezel

This Swiss made watch is powered by the ETA 2824-2 movement. This automatic calibre has been adjusted in an optimized manner within the brand’s Fleurian workshop.

Double-Vé Racing Driver Limited Edition watch movement

The solid engraved back protects a finely decorated movement whose blue galvanized oscillating weight is engraved with the brand logo.

Double-Vé Racing Driver Limited Edition watch case back

The Double-Vé Racing Driver is fitted with a resolutely vintage structured brown calfskin strap that will evolve with the use of its owner, acquiring a nice patina over time.

Double-Vé Racing Driver Limited Edition with black graduated bezel

This model is delivered in a leather travel case bearing the “double-Vé” logo and which can hold up to three watches, an essential accessory when traveling.

It is available on the website at the price of CHF 1290.-

Technical details

Model: Double-Vé Racing Driver
Ref. W020-RD-02

Material: 316L steel
Diameter: 42mm
Thickness: 13mm
20 mm lug
Water resistance: 20 ATM
4 mm thick anti-reflective sapphire crystal
Fluted screw-down crown at 4 o’clock
Unidirectional 120-click steel rotating bezel with anodized aluminum insert, full blue or graduated blue or black to choose from

Blue varnished brass dial
Boxes of indexes machined 0.10 mm and filled with luminescent material
Super-Luminova® bgw9
White and red pad printing
Brass hands, polished and nickel-plated
Hours and minutes hands filled with Super-Luminova® bgw9
Seconds hand with Super-Luminova® bgw9 and end painted in red

Mechanical self-winding movement ETA 2824-2 decorated
Optimized adjustment in our workshop
Blue oscillating weight engraved “double-V”
Frequency 28,800 vph
Power reserve 40 hours

Hours / minutes / seconds / date

Naturally structured brown calf leather that will acquire a patina over time
Ultra-soft leather lining
Steel pin buckle stamped with the “double-V” logo

Grand Seiko Quartz GMT Isetan Shinjuku Limited Edition, SBGN017

In August 2020, Grand Seiko released a limited edition Quartz GMT watch exclusively created for Isetan Shinjuku department store in Japan.

The Grand Seiko Isetan Shinjuku limited model SBGN017 features a 39mm diameter stainless steel case. The hand-finished white dial spotlights a unique stamped pattern inspired the bark of a large tree. This dual-time wristwatch is equipped with the 9F86 quartz movement, a recent addition to the brand’s illustrious 9F family.

Grand Seiko Quartz GMT Isetan Shinjuku Limited Edition, SBGN017

The dial ring is painted in two tones of blue and white, and you can intuitively distinguish the day and night of the second time zone pointed by the red GMT hand. The steel external bezel features 24H marking with Arabic numbers for even hours.

Limited to 56 pieces, this special watch (reference SBGN017) belongs to the Grand Seiko Sports Collection. It has a water resistance of 100 meters.

The case thickness is 12.1 mm. The back cover is engraved with the lion’s coat of arms and the words “LIMITED EDITION”. The watch is provided with a stainless steel bracelet. The single-push, three-fold clasp features the GS logo.

Technical details

Model: Grand Seiko Quartz GMT Isetan Shinjuku Limited Edition
Collection: Grand Seiko Sport
Reference: SBGN017

Stainless steel case
Diameter: 39 mm
Thickness: 12.1 mm
Sapphire crystal glass
Water resistance: 10 bar
Screw-in steel case back with GS Lion emblem and LIMITED EDITION engraving
Case number: 9F86 0AG0

Quartz Cal. 9F86
Battery life: About 3 years
Accuracy: Annual difference ± 10 seconds function; 24-hour hand (dual time display function)
Screw lock type crown
With calendar (date) function
Second hand stop function
Calendar interlocking time difference correction function

White dial

Stainless steel

Limited edition of 56 pieces

396,000 yen (tax included)

UNDONE Nippon Erotica: Shunga Collection

Introduced in 2020, this UNDONE watch collection features two watches; the UNDONE Shunga: Edo and the UNDONE Shunga: Meiji. Each design is limited to 300 pieces worldwide and is uniquely serialized. These are a reinterpretation of the erotic watch aesthetic that was indicative of the high society in the 17th century and is still sought after in this present day and age.

The UNDONE Nippon Erotica: Shunga Collection explores both the art of escapism by the high society in the 17th century and the art of Shunga, a type of Japanese erotic art usually executed in the style of ukiyo-e.

UNDONE Nippon Erotica: Shunga Collection

The art was seen as a lucky charm to samurai, chonin (subordinate to the warrior class), and housewives; they would all suffer from separation from the opposite sex – arguing that Shunga was not superstitious but libidinous.

The UNDONE Shunga: Edo and the UNDONE Shunga: Meiji feature modern and ancient Shunga paintings, respectively. Without showing more than their upper bodies, the front of the watch leaves enough to your imagination. Turn these pieces around and you will be met with the “practical” part of the watch, the full scene of a pair engaging in coitus with a glimpse of the movement behind the patterned glass caseback.

UNDONE Nippon Erotica: Shunga Collection

The dials on both pieces are finished with “當世風俗通” (the Ukiyo custom of pleasureseeking) at 12 o’clock and “春” (Shunga) meaning the picture of spring, a euphemism for sex, on chronograph counter located at 9:00.

The UNDONE Shunga: Edo sports a muted and aged colorway with a beige and silver dial, paired with a vintage grey strap. UNDONE Shunga: Meiji flaunts an industrial modern theme with a navy and silver dial pairing and is complemented with a navy-blue suede strap.

UNDONE Nippon Erotica: Shunga Collection

The 316L stainless steel case is 12.7mm thick with a hardened domed K1 crystal and a display caseback. With a case width of 40mm and a lug-to-lug of 47.6mm, it offers versatility to suit both men’s and women’s wrists. Water resistance is guaranteed at 3 ATM/30 meters.

UNDONE Nippon Erotica: Shunga Collection

The watch is equipped with the Japanese TMI VK64 Mechanical-Quartz Hybrid Flyback Chronograph movement (supplied by SEIKO Manufacturing (H.K.) Limited), with a sweeping central chronograph seconds. The subdials show a 24-hour display and 60-minute counter.

The strap is immediately comfortable and is fitted with quick release spring bars that conform to the trendy swappable design.

The recommended retail price is USD 339.

[UNDONE Watches are now available at]

Grand Seiko Spring Drive GMT Thong Sia Group Special Edition, Reference SBGE267G

Launched in 2020 in collaboration with Thong Sia Group, this limited edition Grand Seiko Spring Drive GMT watch features a distinctive Champagne Diamond design. Limited to 140 pieces, SBGE267G was exclusively dedicated to Thong Sia Group, the sole distributor of Seiko and Grand Seiko watches in Singapore, Hong Kong, Macau, Malaysia and Brunei.

This stainless steel dual time wristwatch comes with a radial-brushed chestnut brown dial and a matching 24-H/GMT bezel ring made of sapphire. The hour, minute and second hands as well as the indices are in champagne gold shade. The arrow-shaped GMT hand features a silvery finish. Grand Seiko SBGE267G is provided with a date display at the 4 o’clock and a power reserve indicator at the 9 o’clock.

Grand Seiko Spring Drive GMT Thong Sia Group Special Edition, Reference SBGE267G

Developed in 2006, the 9R66 Spring Drive movement is endowed with the extremely useful GMT display function. This timepiece has a high accuracy comparable to that of a quartz watch, with a daily difference of only ±1 second. Its power reserve is approximately 72 hours.

A new addition to the Grand Seiko Sports family, the Spring Drive GMT SBGE267G model has a water resistance of 200 meters. It comes with a screw-down crown at 4 o’clock. The 44mm case is attached on a stainless steel bracelet. The screw-in stainless steel case-back is engraved with the Grand Seiko Lion emblem, LIMITED EDITION inscription and the serial number.

Technical details

Model: Grand Seiko Sport Collection Spring Drive GMT, Special model dedicated to Thong Sia Group, Reference: SBGE267G

Spring Drive GMT
Caliber: 9R66
Power Reserve: 72 hours
Winding: Automatic
Accuracy: ±1 second per day / ±15 seconds per month (average)
Stop seconds hand function
30 Jewels

Hours, minutes, seconds
GMT/24-hour hand
Calendar-linked time difference adjustment function
Date display
Power reserve indication

Stainless steel case
Diameter: 44mm
Thickness: 14.7mm
External GMT/24H bezel
Dual-curved sapphire crystal with anti-reflective coating on inner surface
Screw-in case back with lion emblem
Screw-down crown
Water resistance: 20Bar (200 meters)

Chestnut brown textured dial

Stainless steel bracelet
Three-fold clasp with push button release

Limited Edition of 140 pieces (Hong Kong, Macau, Malaysia, Brunei and Singapore only)

Grand Seiko Paris Vendôme Boutique Limited Editions, References SBGK011G and SBGK013G

In June 2020, Grand Seiko opened its boutique in Paris to expand its brand presence in the international market. It was designed by famed Japanese architect Kengo Kuma. Located at 7 Place Vendôme in the 1st arrondissement of Paris, it is the largest Grand Seiko boutique in the world. To commemorate this milestone, the Japanese luxury watch label launched two new models from its Elegance collection.

The Paris Vendôme boutique is offering a wide range of Grand Seiko timepieces including creations produced especially to celebrate the brand’s sixtieth anniversary, as well as two exclusive models reserved for this new Parisian setting.

Grand Seiko SBGK011G Boutique Paris Vendôme Limited Edition in Platinum

Among the two exclusive Paris Vendôme boutique watches, SBGK011G features a 950 platinum case and SBGK013G comes with an 18K rose gold case. Each version is limited to 10 pieces.

Grand Seiko SBGK011G Boutique Paris Vendôme Limited Edition in Platinum

They are equipped with the Cal. 9S63, a hand-wound flat movement with a small seconds function at 9 o’clock and a power reserve at 3 o’clock. Visible through the sapphire crystal exhibition back, this caliber provides a power reserve of 72 hours.

The white dial is adorned with a distinct pattern inspired by Parisian cobblestones. The small seconds hand at 9 o’clock is blue-green to match the color of the Vendôme column.

Grand Seiko SBGK013G Boutique Paris Vendôme Limited Edition in 18K Rose Gold

Perfect alliance of technical mastery and sober elegance, these watches are unique to the Grand Seiko Paris Vendôme boutique. They feature 39mm diameter cases, and “EDITION LIMITEE PLACE VENDOME” is engraved on the back of the watches.

Grand Seiko SBGK013G Boutique Paris Vendôme Limited Edition in 18K Rose Gold

The Grand Seiko Paris boutique edition timepieces are provided with crocodile leather straps. Along with each model, the brand is offering an additional crocodile strap in blue-green color, inspired by the tone of the Vendôme column.

Technical details

Grand Seiko Boutique Paris Vendôme Limited Editions
References: SBGK011G and SBGK013G
Grand Seiko Elegance Collection

Caliber 9S63
Mechanical manual-winding movement
Accuracy: –3 to +5 seconds per day (in static position)
Power reserve: 72 hours
33 jewels
Second stop function

Hour, minutes and small seconds
Power reserve display

Magnetic resistance
4,800 A/m

SBGK011G: Platinum 950
SBGK013G: 18K rose gold
Diameter: 39 mm
Lug-to-lug: 44mm
Thickness: 11.6mm
High-definition box-shaped sapphire crystal with anti-reflective treatment
Transparent sapphire crystal case back with lion emblem
Screw-in Case-back ring with “EDITION LIMITEE PLACE VENDÔME” and the limited edition number
Water-resistant: 3 bar (30 meters)

Dial with “Pavés Parisiens” motif

Recommended retail price 
SBGK011G: €38,000
SBGK013G: €28,000

Crocodile leather strap
Folding clasp with push-button opening

SBGK011G: Limited editions of 10 pieces
SBGK013G: Limited editions of 10 pieces
Available only in the Grand Seiko Paris Vendôme Boutique

Boutique address

Grand Seiko Boutique Paris Vendôme
7, Place Vendôme
75001 Paris France
Opening hours: 12 p.m. – 7 p.m. from Tuesday to Saturday

The WeAntStory

Announced in 2020, the WeAntStory is a Swiss made wristwatch inspired by the formidable nature of ants. It is a collaborative project between Luc Pellaton, founder of the Swiss watch brand WATCHE and Chen Zhiguang, contemporary artist, China.

Made of black grade 5 titanium, this timepiece boasts a bold design inspired by the resilience of ants. The stand-out features of the watch are its stealthy appearance, innovative dial design and a flexible strap equipped with a patented technology.

The WeAntStory watch

The front side of the watch is designed after the face of an ant. Featuring an armour-like guilloche pattern, the metal face of the watch incorporates two glass crystals, evoking the eyes of an ant. Through these two openings made of sapphire crystals, the watch displays the hour and minute.

The WeAntStory

Its 47 mm diameter case in polished black grade 5 titanium features black screws and sapphire crystal caseback. The watch houses an automatic calibre with additional module signed WeAntStory. The WeEngine01 movement features an engraved and lacquered oscillating weight. Beating at 28,800 vph, it provides 42 hours power reserve.

Made of Fluoroelastomer (a fluorocarbon-based synthetic rubber), the watch strap is flexible, smooth, odourless and waterproof. It does not feature a buckle or loop, but a patented system for securing it around the wrists.


Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

Introduced in 2020, this extra-ordinary astronomical watch by Christiaan van der Klaauw pays tribute to Royal Eise Eisinga Planetarium, the oldest working Planetarium in the world.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

Suspended from the ceiling of the living room of a beautiful canal house in Franeker, is the oldest still working planetarium in the world. This accurately moving model of the solar system was built between 1774 and 1781 by the Frisian wool comber, Eise Eisinga.

Royal Eise Eisinga Planetarium

Eise Eisinga was born in Dronrijp on February 21, 1744. He attended primary school there. Like many children, at that time, he had to work at home, which his case was in his father’s wool combing establishment. In addition to combing wool, he inherited his father’s interest in matters such as astronomy and mathematics.

Eise Jeltes Eisinga (21 February 1744 – 27 August 1828)
Eise Jeltes Eisinga (21 February 1744 – 27 August 1828)

He was so curious that he went to Franeker every week, where he studied Euclides’s maths books with Willem Wijtses, a wool dyer. At the age of 24, Eisinga married Pietje Jacobs, after which he settled in Franeker in 1768, working as a wool comber.

On May 8, 1774, a special constellation of planets formed. In the early morning, Mercury, Venus, Mars, Jupiter and the moon were positioned closely in the sky. It was claimed that the mutual forces of these celestial bodies would knock the earth off its path and cause it to be burned up by the sun. A preacher from Bozum, Eelco Alta, made this prediction. In April 1774, the Leeuwarder Courant published a piece about this.

His piece of writing carried the title: ‘Philosophical concerns about the conjunction of the planets’. Alta’s ideas caused a lot of unrest among the population. The authorities attempted to intervene by banning the piece of writing, but the damage had already been done.

Royal Eise Eisinga Planetarium
Royal Eise Eisinga Planetarium in Franeker, Friesland, Netherlands

Eisinga’s vast knowledge of mathematics and astronomy came in handy when, in May 1774, turmoil broke out in response to Eelco Alta’s prediction. In order to give the people a correct picture of the solar system, he built a model of the solar system in his living room. Only seven years passed between his very first idea and the final realisation of this project. Since 1781, Eisinga’s model has closely followed the paths of the 6 planets in our solar system. This makes it the oldest still-functioning planetarium in the world.

Royal Eise Eisinga Planetarium in Franeker, Friesland, Netherlands

Christiaan van der Klaauw’s Planetarium timepiece incorporates the smallest mechanical planetarium mechanism in the world, showing real time the orbits of Mercury, Venus, Earth, Mars, Jupiter and Saturn around the sun. The watch also indicates the minutes, hours, date and month.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

Equipped with the in-house developed module, Planetarium is one of the most complicated watches created by Christiaan van der Klaauw. This extremely complex mechanical watch is a fitting tribute to the grand masters of planetarium design such as Nicolaas Copernicus, Johannes Kepler, Christiaan Huygens and Eise Eisinga.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

The PLANETARIUM Eise Eisinga watch was made in a very limited edition of only 6 steel and 6 rose gold models, with each of the 6 watches boasting its own unique planet name.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

Measuring 40mm diameter case made of stainless steel or 18K rose gold, this watch is fitted with a sapphire crystal glass on the front. It houses an automatic mechanical movements equipped with 35 jewels and twin barrels, which provide an impressive power reserve of up to 96 hours.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

The oil-painted dial of the watch was created by Gaël Colon. It features applied rose-gold Roman numerals for 1, 2, 3,9,10 and 11 hour-markers. The 12-h marker is replaced with the Christiaan van der Klaauw logo. The watch does not feature any hour-markers on the lower dial part for ensuring more focus on the planetarium complication.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

The CVDK PLANETARIUM Eise Eisinga watch features two centre hands in rose gold to indicate the hour and minutes respectively. A sub-dial at 12 o’ clock with two gold hands displays the date and month. The planetarium is placed at 6 o’ clock.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

The sapphire crystal case back affords the spectacular view of the self-winding movement and its artistically engraved oscillating weight, which highlights planets, stars and the ‘Sun with 12 Claws’ as well as the logo of Christiaan van der Klaauw.

Christiaan van der Klaauw CVDK Planetarium Eise Eisinga Limited Edition watch

Technical details

Model: CVDK PLANETARIUM Eise Eisinga Limited Edition

CVDK7386, automatic winding, 35 jewels, twin barrel
Power-reserve: 96 hour maximum
Complication: CVDK Planetarium module
The rotor is engraved with planets, stars and the ‘Sun with 12 Claws’, the logo of Christiaan van der Klaauw

Hours, minutes, date and month
Planetarium: the watch is equipped with the smallest mechanical Planetarium in the world, showing the orbits of Mercury, Venus, Earth, Mars, Jupiter and Saturn around the Sun.

Case material: High quality steel or Rose gold
Case diameter: 40 mm
Sapphire crystal front glass
Sapphire crystal case-back
Each case is uniquely engraved with the name of one of the 6 planets: Mercury, Venus, Earth, Mars, Jupiter or Saturn.

Oil painted dial made by the artist Gaël Colon, rose gold plated indexes.
Planetarium with customized colored hand painted planets.

Black leather
Buckle: Logo engraved steel folding clasp/ rose gold buckle

Limited Edition
6 unique watches in steel, each uniquely engraved with the name of one of the 6 planets: Mercury, Venus, Earth, Mars, Jupiter or Saturn.

Retail price
Stainless steel version: € 43,950
Rose gold version: € 58,450

Orologi Calamai Chronograph G50/F

Exclusively designed for pilots and navigators, the Orologi Calamai Chronograph G50/F (Freccia) comes with a robust watch case forged from the steel of an F104 Starfighter jet plane that served in the Italian Air Force. Presently available in four dial versions, this automatic pilot’s chronograph is equipped with the Swiss made Sellita SW510 Top Grade movement.

Orologi Calamai Chronograph G50/F with blue dial

Founded in 2008 by Francesco Calamai, this small Italian watch company is an official supplier of wristwatches for the Pilots of the Italian Airforce.

This military-grade automatic timepiece takes inspiration from the legendary aviation chronographs. The case of each Orologi Calamai Chronograph G50/F was forged by melting the steel of the G.E. turbine that powered an F-104 of the Italian Air Force.

Orologi Calamai Chronograph G50 F Case back

Indeed, the serial number of the exact turbine utilised is engraved on the caseback. Its 40mm diameter case features alternating brushed and polished finishing. Apart from the time-setting crown at 3 o’ clock, G50/F has an additional crown at 10 o’ clock for operating the inner rotating bezel.

Orologi Calamai Chronograph G50/F

The watch case has been optimised to be as thin as possible by using ultra-modern techniques. The caseback was transformed from a traditional screwed-on model to a more rounded one secured by 4 peripheral screws to accommodate the rotor of the automatic winding mechanism. The crowns and chronograph pushbuttons are specifically designed to be in harmony with the casing and to offer the best grip possible in all conditions.

Orologi Calamai Chronograph G50 F black dial

The dial has been designed to ensure enhanced readability. The applied hour markers are made of metal and highlighted by a generous use of SuperLuminova®. The same technique was used for the numbers and text, with the characters designed to maximise readability in small dimensions.

G50/F has two syringe-shaped luminescent hands for hours and minutes. Tips of the chronograph hands (central 60 seconds, 30-minutes and 12-hour) are highlighted with red color. The watch displays the date at 4.30H.

Orologi Calamai Chronograph G50 F

The Sellita 510 is an evolution of the self-winding calibre SW500, with the main difference being in the arrangement of the registers, evolving from a 12-3-6 layout to the classic 3-6-9. This chronograph watch houses a “coulisse” escapement, which is less elaborate than the “column shaft” mechanism but offers great advantages in terms of robustness, simplicity and reliability.

The Orologi Calamai Chronograph G50/F is available in Black “sablé”, Blu Soleil, Dark Brown and Anthracite dial versions.

Technical details

Diameter: 40 mm
Thickness: 14.40 mm
Material: Stainless Steel
Crown: Screw Down
Glass: Sapphire crystal with double AR coating
Water resistance: 5 ATM (approximately 50 meters)

SW510 Top Grade
Diameter: 30mm – 13¼’’’
Height: 7.90mm
Power reserve: 48 hrs
Number of Jewels: 25
Frequency: 28,800 A/h


Cowhide strap made in Italy
Width: 20 mm
Pin Buckle

Retail price
2,450 Euros

Vianney Halter Deep Space Resonance Prototype

Independent Swiss master watchmaker Vianney Halter presents the Deep Space Resonance, a modern and technical interpretation of his 3 axis tourbillon. In this new creation, Vianney reengineered the tourbillon cage in order to integrate two acoustically synchronized balance wheels.

Vianney Halter Deep Space Resonance Prototype
Photos credit: Guy LUCAS de PESLOUAN/ Vianney Halter

The idea of creating an acoustically resonant double-balance timepiece emerged in Vianney’s mind in 1996 when he started learning to play the piano.

When attuning the keys where three harmonic strings overlap, Vianney noticed an energy exchange between the strings that forced them to resonate. Just like on the tuning fork, the resonance mechanism seemed to depend on the fixed base through which the energy flows. He believed that there could be a similar way to synchronize two balance wheels.

As he was doing some research on the subject, Vianney found early 1800s blueprints of Abraham Louis Breguet’s attempts to achieve resonance. The schematics showed devices allowing for the fine tuning of the distance that separated the two balance wheels, which were in this case using a fundamentally different coupling than the piano or tuning fork.

Breguet’s works were based on the interactions between the balance wheel rims and the air between them, using the air as a fluid gearing. In this case the size of the gap, air viscosity and rotation directions were critical. Air behaved as a clutch and only one rotation was allowed. Without air, there could be no resonance.

On the other hand in order for the acoustic resonance phenomenon to occur, waves are of utmost importance. Using a linkage of some sorts, waves could be transmitted from one balance to the other. By having both spirals attached to a well designed common bridge, the two oscillators could influence each other and attain resonance, whichever direction the balances were turning.

In order to form solid bases for the mechanical groundworks, Vianney needed to study the pre-existing resonance watches, then craft an instrument that could demonstrate the possibility of resonance from coupling two oscillators. He then started collecting every chronometric object linked to undulatory phenomena he could, aiming to build such a demonstrator.

In 2007, Vianney Halter started the construction of the demonstrator he has been imagining since 2005. To build his movement, he used two identical Russian POLJOT deck watches that give him identical gear trains. For the two balances to resonate, he needed the two oscillators to be as similar as possible, and links them using a solid bridge, like in a tuning fork.

In 2012, Vianney brought an antique mechanical clock made by French clockmaker Jacques Langlois in 1660. With the help of horological expert Jean-Claude Sabrier, he discovered the clock is in fact one that Christiaan Huygens subcontracted to various craftsmen to demonstrate his isochronism theory.

In 2016, a major scientific discovery encouraged Vianney to continue his dream project. Almost a century after Albert Einstein relativity theory, gravitational waves were detected, confirming the existence of two collapsing black holes.

Space-Time is the fabric of our Universe. Heavy objects bend it and deform it and when they accelerate or collide, those objects generate waves that propagate through the cosmos at light speed, in all directions. Those waves perturbate the whole Universe, and finally were measured on Earth using a resonance based space-time seismograph.

This discovery was so important to Vianney he was determined to finish the research about acoustic horological resonance. By trying multiple configurations for the coupling of the two balances, he eventually found one that allows acoustic resonance without relying on aerodynamics.

At the same time, a new idea and new challenge emerged. In 2011 Vianney has decided to create a timepiece that reminds us of our four dimensions during our stellar travels. Introduced in 2013, the Deep Space Tourbillon watch with a 3 axis central tourbillon shows you the physical dimensions, surrounded by the display of our 4th dimension, time.

With these 4 dimensions making the elastic fabric of our universe, being warped and reshaped by gravitational waves, it appeared evident that the resonating oscillators will be placed at the center of the Deep Space Tourbillon.

The study of the demonstrators configurations allowed to define the tuning fork configuration in which will be the two balances. To prevent the wave dissipation, Vianney chooses specific, solid materials, and minimizes the length and complexity of the path the wave must travel. This led to the configuration in which the two spirals are mounted opposite in front of each other. Using a rigid shared bridge for the two spirals, Vianney made sure that the resulting resonance was a genuine behavior, not a functional artefact.

Work and perseverance eventually bore fruit, and at the beginning of 2019 the two balances in the demonstrator were beating as one. The behavior was stable and allowed Vianney to start the construction of a wrist worn model: the Deep Space Resonance.

The Deep Space Resonance Prototype immense works took over the entirety of 2020. Vianney built it to check that the acoustic synchronization correctly functions when worn on the wrist.

Vianney Halter Deep Space Resonance Prototype
Photos credit: Guy LUCAS de PESLOUAN/ Vianney Halter

Thanks to the three axis rotation, every detail on the structure is visible. The complexity of the mechanism is highlighted by a unique and light architectural construction. The 42 polished curved pillars that hold the bridges are inspired by an antique Achille Benoît marine chronometer that dates back to 1840. Every part of the mechanism is traditionally decorated and refined by hand for a breathtaking effect. Despite the apparent complexity, the technological architecture was kept at the most simple and efficient.

The axis structure is layered in concentric cages: The innermost cage holds the balances and weighs 0.6 grams for 162 parts. This cage rotates inside the traverse in 60 seconds. The traverse weighs 2.8 grams and rotates around its horizontal axis in 6 minutes. The traverse is mounted in the cradle, which rotates on its vertical axis in 30 minutes. The whole 3 axis system counts 371 individual parts.

The beating frequency of balances is nominally 21‘600 vph but in reality they vary a little. Each balance will transmit its motion to the shared bridge which will in turn affect the other balance. This way, both balances will influence each other, and quickly and reliably reach a common frequency. In turn, this makes the whole regulating system more accurate.

The Deep Space Resonance Prototype is a manually wound, 65h power reserve watch. The balances start to resonate as soon as the energy is sufficient to set the balances in motion, and stay synchronized until all motion stops. The balances will synchronize and oscillate at the same time, but not necessarily in the same direction at the same time. This will define the resonance mode.

The mode depends on the position the balances were occupying when they started beating, and will keep this mode until the end of the power reserve. The next time the watch is wound, the balances may start beating in a different mode, and will offer a new view to the resonance phenomenon.

The dial is directly inspired by the Vernier calliper. The Hours and Quarters can be read in the top aperture. At the bottom aperture one can read the supplemental minutes by finding where the marks match the best.

For the final realizations of this technical device, the reading of the time will be easier thanks to a fascinating dial specifically designed to match the resonance principles. The power reserve will be drastically enhanced.