Thin Swiss 18 carat yellow gold dress watch Circa 1920

Swiss open faced lever watch
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A fine and thin, keyless Swiss, 18K yellow gold dress watch, circa 1920. A solid, polished, hinged gold cuvette. White enamel dial with painted Breguet numerals, outer minute track, sunk subsidiary seconds dial. Yellow gold Louis XVI hands. Nickel-silver movement, Geneva striping decoration, 18 jewels, straight-line counterpoised lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring. Dial, case and movement signed.
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Diameter: 47 mm
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Signed: Patek Philippe & Cie.  Genève