Vacheron Constantin Malte Tonneau Tourbillon Platinum “Only Watch 2007” – Ref 30066/001P-9293 « Pièce Unique »

Unveiled 2007, the Malte Tonneau Tourbillon Platinum is the first tourbillon model with a platinum carriage bridge from the legendary Swiss watch brand Vacheron Constantin. The extremely complex crafting of this carriage bridge endowed with such a superlative level of finishing represents an extraordinary feat in itself, particularly given the malleability of the metal.

In addition to the platinum carriage bridge, the case and dial – both discreetly bearing the Pt 950 hallmark – are also in solid platinum. The dial is meticulously grained using a high-tech procedure to achieve a frosted effect that highlights the texture and the luminosity of the precious metal.Finally, the navy blue alligator leather strap hand-sewn with platinum thread, together with its solid platinum pin buckle, subtly echo the colour of the case and dial to create an exquisitely harmonious aesthetic impression.
The combination of these various aspects gives this one-of-a-kind creation a status of absolute rarity, clearly stemming from the Vacheron Constantin expertise acquired throughout an exceptional heritage built up during over 250 years of uninterrupted experience and expertise.

The “Malte Tourbillon Platinum”, named after the brand emblem, powerfully embodies a symbiosis of contemporary design and technical horology.Reflecting all the signature features of the Malte line by Vacheron Constantin, including stepped lugs and fan-shaped hands, its tonneau-shaped case underscores the distinctive and sophisticated nature of a highly technical and precious model.

The 1790H340R31 PT movement, entirely designed and manufactured by Vacheron Constantin, has been the object of exceptional finishing operations that are impossible to perform mechanically, particularly on its bars or lugs. This work, known as “berçage” or rounding off, consists in perfectly regular filing of the tips of the arms in order to give them a cone-like or semi-cylindrical shape, while carefully marking off the centre and the heels. To complete this operation, the craftsmen smooth the part using stones, buffs, wooden pegs and finishing pastes to achieve perfectly polished rounding off. No less than eleven hours are required to meet the stringent finishing criteria imposed by Vacheron Constantin. Calibre 1790 confirms its exceptional nature through the “Côtes de Genève” motif, the meticulous hand chamfering of the bridge edges.

TECHNICAL DETAILS
Calibre:
Reference:1790H340R31PT Tourbillon, hand-wound mechanical movement
Carriage bridge :950 Platinum
Diameter:26.90 mm, 28.50 mm
Thickness:6.10 mm
Number of jewels:27
Frequency:18,000 vibrations / hour
Power reserve:Over 40 hours

Indications
Hour, minutes, seconds, power-reserve indicator
Pointer-type date calendar

Case
Material: 950 Platinum, bearing the inscription Pt 950
Diameter and thickness: 36.00 mm, 48.20 mm, 11.80 mm
Shape and construction :“Tonneau”, three parts
Back: Fitted with a transparent, sapphire crystal, secured with screws
Finish: Entirely polished case, satin finish between lugs,Satin-finished back
Glass: Sapphire glass with anti-reflective coating on one side, convex
Water-resistant: Pressure of 3 Atm, equivalent to a depth of 30 m (~100 feet)

Dial and hands
Dial material: 950 Platinum
Finish: Frosted effect, bearing the inscription Pt 950
Nine applied hour markers in 18K white gold
Hands: Hours&minutes: 18K white gold fan-shaped matte/polished finish; Seconds: white Pfinodal baton-shaped; 31 days: black oxidised, fan-shaped; Power reserve: 18K white gold, baton-shaped

Bracelet and buckle
Hand-stitched with platinum wire, saddle finish
Dark blue alligator mississipiensis leather, square scales
Standard buckle in 950 Platinum,
Half Maltese cross, polished, 18 mm

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