Swiss/French gold Belle Epoque pendant watch Circa 1915

Gold lever watch with matching chain
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A very fine and elegant Swiss/French 18K gold, enamel, platinum and diamond-set keyless pendant watch with matching gold and enamel chain, circa 1915. The back is overlaid with pink guilloche enamel with line borders with applied platinum and a diamond-set monogram with a crown. Engine-turned gold dial with painted Arabic numerals in silver reserves, outer minute track, subsidiary seconds 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, engraved Grand Prix Paris 1900. Case stamped and numbered.
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Diameter: 26 mm
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Signed: No Name