Swiss 18K yellow gold engraved keyless dress watch Circa 1920

Gold open faced lever
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A fine, thin Swiss 18 carat yellow gold keyless dress watch, circa 1920. A solid, polished case, bezel and band engraved with oak leaf wreath, pentagonal pendant, and snap on case back. White enamel dial with black painted Arabic numerals, concentric oak leaf wreath, outer dot minute track, sunk subsidiary seconds and blued steel cathédrale hands. Rhodium plated movement, Geneva striping decoration, 17 jewels, straight line lever escapement, cut bimetallic compensation balance, blued steel flat balance spring, swan neck regulator. Dial and movement signed, case numbered.
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Diameter: 42 mm
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Signed: Audemars Piguet & Co.  Brassus & Genève
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The dial is slightly scratched