The Vacheron Chronograph Made for the US Corps of Engineers for Use in World War I: Built for the Rigors of War
"Due to the Corps’ requirement for a robust and accurate chronograph to be used during various activities, the head of the U.S. Expeditionary Force in Bern requested that Vacheron Constantin produce a prototype for field use. The watch was to have a silver case, a white dial with luminous Arabic numerals and hands, and a simple chronograph movement without counter. Vacheron Constantin produced two prototypes that were delivered on May 8, 1918; an order for 5,000 pieces was placed that same day. The original order was to be delivered in lots of 100 watches per month, 150-200 whenever possible. From July 1918 through late 1919, a total of 3,289 watches were delivered, and the contract was deemed to have been met. Vacheron Constantin archives indicate that the firm also made wristwatches with silver cases and gold buckles for the Corps of Engineers."
NEW: Vacheron Constantin Patrimony Contemporaine Small
Technical Specifications
Patrimony Contemporaine small model
Ref. 81530/000R-9682 (18K 5N pink gold)
Ref. 81530/000G-9681 (18K white gold)
Movement
Calibre 1400, developed and crafted by Vacheron Constantin
Stamped with the Hallmark of Geneva
Mechanical, manual-winding
Movement thickness: 2.60 mm
Movement diameter: 20.65 mm (9 lignes)
Number of Jewels: 20
Number of components: 98
Frequency: 4Hz (28,800 vibrations/hour)
Indications: Hours and minutes
Power reserve: Approximately 40 hours
Case
18K 5N pink gold or 18K white gold
Transparent, sapphire crystal caseback
Caseband set with 62 brilliant-cut diamonds, total weight of approx. 0.39 carat
36 mm diameter
Water resistance
Tested at a pressure of 3 bar (approximately 30 metres)
Dial
Silvererd opaline, convex external zone with circular grained minute-track
Index applied in 18K gold
Strap
Dark blue or warm grey Mississippiensis alligator, stitched-tip, square scales
Delivered with a second strap in anthracite satin
Clasp
18K white gold or 18K 5N pink gold buckle,
Polished half Maltese cross