Swiss yellow and white gold open faced lever watch Circa 1900

Two coloured gold keyless watch
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A Swiss yellow and white gold open faced keyless pocket watch made by Vacheron Constantin SA in Geneva, circa 1900.The jewelled movement with a lever escapement. Two tone silvered dial with applied Arabic hour numerals, outer dot minute divisions, engine turned subsidiary seconds at 6 o’clock and Breguet hands. A plain two coloured gold case, the snap-on back is engraved J.C.C. 30. Dial signed, case and movement signed and numbered.
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Diameter: 44 mm
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Signed: Vacheron & Constantin Genève