Fine Swiss 18 carat gold open faced lever watch Circa 1910

Gold keyless lever by Vacheron & Constantin
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A fine Swiss 18 carat gold open faced keyless lever pocket watch, circa 1910. 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 painted Roman numerals, outer minute track with Arabic five minute numerals, subsidiary seconds and original gold spade hands. Plain case. Dial, case, cuvette and movement signed, case numbered.
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Diameter: 49 mm
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Signed: Vacheron & Constantin Genève