Swiss gold open faced lady’s pendant watch Circa 1900

Gold watch with engraved cypher
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A Swiss 18 carat yellow gold open faced keyless pendant watch made by Ulysse Nardin, Le Locle & Geneva, circa 1900. The case back is polished, engraved and black enamelled with the cypher JB. White enamel dial, with bold Roman numerals, outer minute track, subsidiary seconds at 6 and yellow gold Breguet hands. A rhodium plated movement, going barrel, straight line lever escapement, cut bimetallic compensated balance with gold poising screws and blued steel hairspring with terminal curve, polished steel index regulator. Signature on the dial and movement.
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Diameter: 30 mm
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Weight: 21 g
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Signed: Ulysse Nardin, Le Locle & Geneva
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Accompanied by a contemporary fitted box.