Swiss gold Belle Epoque keyless pendant watch Circa 1910

Gold and enamel lady’s watch
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An elegant Swiss 18K gold and enamel lady’s Belle Epoque keyless pendant watch, circa 1910. The case has a leaf and flower chased bezel, hammered band, the back cover overlaid with transparent blue guilloche enamel over sunray engine-turning, outer border to match the bezel with white enamel line borders. Hinged gold cuvette. Matte silver dial with champlevé Paris numerals and outer minute track and blued steel Breguet hands. A rhodium-plated movement, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Dial, cuvette and movement signed.
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Diameter: 28 mm
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Signed: Vacheron & Constantin  Geneva