Swiss silver lever deck chronometer with power reserve Circa 1940

Silver navigation watch 
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A rare and large Swiss silver keyless deck and pocket lever Chronometer navigation watch with power reserve indicator and Guillaume balance, circa 1940. A polished case with a hinged silver cuvette. Brushed silver dial with painted black Arabic numerals, outer minute track, up and down indication below 12, and large subsidiary seconds dial and blued steel spade hands. Rhodium plated movement, Geneva striping decoration, 18 jewels, straight line lever escapement, cut bimetallic Anibal brass Guillaume balance, blued steel Breguet balance spring, swanneck micrometre regulator. Dial, case and movement signed.
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Diameter: 60 mm
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Signed: Vacheron & Constantin Genève
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This timepiece is from a series of 150 lever chronometers made by Vacheron Constantin for navigational use in the 1940s.