Swiss gold, enamel keyless lady’s pendant watch Circa 1900

Gold open faced lever watch
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A very fine Swiss 18K gold, enamel and diamond-set keyless lady’s pendant watch, circa 1900. Chased leaf band, the bezel with purple guilloché and white dot enamel decoration, the back cover decorated with rings of guilloché purple and white enamel and chased gold, central diamond-set platinum rosette. Hinged gold cuvette.

Silvered dial with champlevé Breguet numerals, outer minute track, engine-turned centre. Gold Louis XV hands. Frosted gilt, 15 jewels, straight-line lever escapement, cut bimetallic compensation balance with blued steel flat balance spring, index regulator. Dial, case and movement signed.
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Diameter: 28 mm
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Signed: Vacheron & Constantin  Genève