Rare Swiss silver deck and pocket lever chronometer Circa 1940

Gold open faced lever pocket watch
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A fine and rare Swiss, large, silver, keyless deck and pocket lever chronometer, circa 1940. A polished, silver case, hinged cuvette. Silver, brushed dial, Arabic numerals, outer minute divisions, large subsidiary seconds. Blued steel spade hands. A rhodium-plated movement, Geneva striping decoration, 19 jewels, straight-line lever escapement, cut bimetallic balance with gold timing screws, Breguet balance spring, swan-neck micrometre regulator. Dial, case and movement signed.
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Diameter: 59 mm
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Signed: Vacheron & Constantin  Genève