Montblanc 1858 Chronograph Tachymeter Only Watch 2019 Unique Piece

To support the Only Watch 2019 charity auction, Montblanc is donating the 1858 Split Second Chronograph Only Watch 2019 which combines titanium and a natural stone, the blue agate.

Now presenting its 8th Edition, Only Watch is a biennale auction of unique timepieces created by some of the finest brands that have raised over 40 million Euros to date. Under the patronage of HSH Prince Albert II of Monaco, and following the initiative of Luc Pettavino, President of the Association Monégasque contre les Myopathies, Only Watch is an international watchmaking charity event. The auction unites watchmakers from both the large groups and small independents who all express their creativity and generosity through great timepieces crafted from the heart.

All of the funds collected from the sale of the watches are donated in their entirety to scientific and medical research units working on neuromuscular diseases in general and on Duchenne muscular dystrophy in particular. The watches will embark on a world tour on September 25th 2019, starting at the Monaco Yacht show in the charity’s hometown, and then continuing to Dubai, Paris, London, New York, Tokyo, Singapore, Hong Kong and Taipei, before the final auction in Geneva on November 9th 2019. The auction is organized in partnership with Christies and will take place at the Four Seasons Hôtel des Bergues in Geneva.

Precise, legible and robust, the legendary professional Minerva watches were conceived for military use and exploration. Inspired by these historical timepieces, the Montblanc 1858 product line pays tribute to the Minerva Manufacture’s heritage.

In the spirit of mountain exploration, Montblanc reinterprets an historical Minerva military monopusher chronograph from the 1930’s with the one-of-a kind 1858 Split Second
Chronograph Only Watch 2019. For the first time, Montblanc unveils a wristwatch which
combines a 44 mm case in full satin-finished titanium grade-two, the hand-crafted Montblanc Manufacture Monopusher Chronograph calibre MB M16.31, a brand-new matching Sfumato alligator strap and a special dial made of degraded blue Agate, a natural stone, giving an unique blue appearance – all those elements making it the ideal watch for collectors.

Like on the original timepiece, the unique piece features a telemeter scale that runs around the dial, which was a typical feature on the legendary Minerva chronographs. A telemeter makes it possible to measure the distance of a phenomenon which is both visible and audible, like the lightning and thunder in a storm.

A tachymeter scale (base 1000) is also visible at the centre of the dial in a “colimaçon” (snail shape), which allows the user to measure a length of time up to three minutes instead of one minute in a traditional chronograph scale around the dial. The tachymeter scale is to show the speed of a moving object, such as a car, over a known distance.

Additionally, the Montblanc engineers have developed a “rattrapante” (split second) complication that allows the owner to measure intermediate times without interrupting the ongoing measurement of a longer elapsing time. The “rattrapante” can be admired through the sapphire glass of the case back like on traditional timepiece with such a function.

The timepiece features the historical design codes taken from the original 1930s Minerva chronograph including large cathedral hands with a cloisonné design filled with white SuperLumiNova® and luminescent Arabic numerals. Other design details include the original Montblanc logo from the 1930s era with its historical font and emblem of the Mont Blanc Mountain in the centre. For utmost visibility, the chronograph indications are displayed with a black-rhodium-coated central chronograph second hand, a red-coloured split second hand to measure a second time interval and a chronograph minute counter at three o’clock.

On the case back, the sapphire crystal reveals the beauty of the Montblanc Manufacture
monopusher chronograph Calibre MB M16.31, that features two column wheels, a horizontal coupling, a power reserve of 50 hours and a large screwed balance beating at the traditional frequency of 18,000 semi-oscillations per hour.

The Montblanc Manufacture in Villeret is part of only a select group of Maisons that possess the know-how to produce the hairspring internally allowing to have one of the largest screwed balance wheel. The movement takes its inspiration from the original Minerva calibre 17.29 developed in the 1930s, that was used for both pocket watches and wristwatches.

This calibre is recognisable thanks to its handcrafted finishings – Côtes de Genève stripes, inner angles, circular graining and bevelling – as well as its fine details such as the Minerva arrow and the chronograph bridge shaped in the form of a “V” whose design was protected in 1912.

In order to guarantee the performance of the 1858 Split Second Chronograph Only Watch 2019, it undergoes over 500 hours of simulated wear, with specific testing and controls under real-life conditions.

Technical details

Model: Montblanc 1858 Split Second Chronograph Only Watch 2019
Ident. 125558

Movement
Montblanc Manufacture Calibre MB M16.31
Type of movement: Manually wound monopusher chronograph with split second, tachymeter and telemeter
Chronograph Monopusher with two column-wheels (one for the chronograph and one for the split second) and horizontal coupling
Diameter = 38.4 mm; height = 8.13 mm
Number of components: 286
Number of rubies: 25
Power reserve: Approx. 50 hours
Balance: Screw balance, diameter = 14.5 mm; moment of inertia = 59 mgcm²
Frequency: 18,000 A/h (2.5 Hz)
Hairspring: With Phillips terminal curve
Plate: Rhodium-plated german silver with circular graining on both sides
Bridges: Rhodium-plated german silver with “Côtes de Genève”
Going-train: Gold-plated, faceted arms, diamond polished surfaces

Displays
Hours and minutes from the center
Small seconds at “9 o’clock”
Chronograph’s elapsed-second and split-second hands from the dial’s center
Counter for 30 elapsed minutes at “3 o’clock”
Tachymeter and telemeter scales
Habillage

Case
Satin-finished titanium
Diameter = 44 mm; height = 14.55 mm
Crystal: Scratch-resistant, domed sapphire, antireflective crystal, anti-magnetized treatment
Back: Screwed titanium case back with inset pane of sapphire crystal and Only Watch special engraving
Watertightness: 3 bar
Crown: Titanium with Montblanc Emblem in raised relief
Pushers: Monopusher chronograph integrated into the crown and one pusher at 2 o’clock for the split-second

Dial
Agate stone dial with white Arabic numerals with Super-LumiNova® coating, black rhodium-plated luminescent hour-hand and minute-hands, black rhodium-plated central chronograph and second hand, red-colored split-second hand, historical Montblanc emblem at 12 o’clock, tachymeter scale on the central part of the dial and telemeter on the exterior of the dial

Strap
Sfumato blue alligator-skin with beige stitching

Limited Edition
Unique Piece for Only Watch

Certification
Certified by the Montblanc Laboratory Test 500

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