Swiss gold lady’s watch with detachable brooch Circa 1900

Gold, enamel and diamond-set pendant watch
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A fine Swiss, 18K gold, enamel and rose-cut diamond-set, keyless lady’s pendant watch with a detachable brooch, circa 1900. Hinged bezel decorated with translucent sea-blue enamel over engraved leaves interspersed with rose-cut diamonds, engraved band, hinged back overlaid with sea-blue translucent enamel over an engraved winged cherub’s head amongst stars, rose-cut diamond set scroll border. Hinged gold cuvette. White enamel dial with blue Arabic numerals, outer gold dot minute divisions. Gilt Louis XV hands. A frosted gilt movement, bar calibre, 15 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel flat balance spring, index regulator. Cuvette signed. 
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Diameter: 24 mm
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Signed: Haas Neveux & Co.  Geneva