Swiss gold, enamel and diamond-set pendant watch Circa 1911

Gold pendant watch with matching chain 
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A very fine Swiss, 18K gold and enamel, rose diamond-set, keyless pendant watch with matching chain, circa 1911. Belle Epoque by Vacheron & Constantin, Genève. The back is overlaid with grey/green translucent guilloché enamel, applied diamond-set foliate filigree mount, en suite chain with enamelled cylindrical bars interspersed with chain links. Dedicated hinged gold cuvette. Silver dial with Breguet numerals, engine-turned centre, outer minute track. Gold Breguet hands. A rhodium-plated movement, Geneva striping decoration, 16 jewels, straight-line lever escapement, cut-bimetallic compensation balance with seven adjustments, flat balance spring, index regulator. Dial, case and movement signed.
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Diameter: 31 mm
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Signed: Vacheron & Constantin  Genève