Swiss 18K yellow gold open faced pocket watch Circa 1930

Gold keyless lever pocket watch
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A very fine and thin Swiss 18K yellow gold keyless lady’s pendant watch, circa 1930. Champlevé dial with radial Arabic numerals, outer dot minute divisions and blued steel hands. A frosted gilt movement, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, and a swan-neck micrometre regulator. Case and movement are signed.
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Thickness: 6 mm
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Diameter: 43 mm
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Signed: Anonymous  Swiss