Vacheron Constantin Ultra-fine 1955 specifications

Reference: Historique Ultra-fine 1955 33155/000R-9588

The World’s thinnest mechanical hand-wound watch measuring just 4.10 mm thick to date

Movement: 1003 Rebuilt in 18-carat gold for its 55th anniversary in 2010. Developed and manufactured by Vacheron Constantin. Stamped with the Hallmark of Geneva

Mechanical, manual-winding

The thinnest in the world at just 1.64 mm thick

Thickness of movement: 1.64 mm

Diameter of movement: 20.80 mm

Jewels: 18 jewels

Frequency: 18'000 vibrations/hour

Indications: Hours, minutes

Power reserve: More than 30 hours

Case: 18 carat 4N rose gold

Diameter: 36.00 mm. Thickness: 4.1 mm

Water resistance: 3 bar, equivalent to 30 meters

Dial: 18 carat gold, silvered opaline
Mirror-polished Maltese Cross and indexes

Strap: Black hand-stitched, saddle-finished
Square-shape scales alligator leather.

Clasp: Buckle in 18 carat 4N rose gold, polished half Maltese Cross