Swiss gold and diamond-set keyless pendant ball watch Circa 1880

Gold and diamond Boule De Genève
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A Swiss 18k yellow gold and rose-cut diamond-set keyless pendant ball watch, circa 1880. The case is polished and foliate engraved, and the front cover is set with a rose-cut diamond-set flower and hinged gold cuvette. White enamel dial, Arabic numerals, outer gold dot minute divisions and blued steel spade hands. A frosted gilt movement, cylinder escapement, three-arm balance, blued steel flat balance spring, and an index regulator.
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Diameter: 26 mm
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Signed: No name
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Some lacking elements on the case and some hairlines on the dial.