Swiss gold open faced keyless lever pocket watch Circa 1905

Gold keyless lever by Vacheron & Constantin
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A fine Swiss 18 carat gold open faced keyless lever pocket watch, circa 1905. Frosted gilt movement, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Gold hinged cuvette. White enamel dial with Breguet numerals, outer minute track, subsidiary seconds and rose pink gold spade hands. Solid, polished case with sunray engine turned case back. Dial, case, cuvette and movement signed, case and movement numbered.
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Diameter: 49.5 mm
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Signed: Vacheron & Constantin Genève