Fine Swiss 18k gold open-faced lever dress watch Circa 1920

Gold keyless lever pocket watch by Girard-Perregaux
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A fine Swiss 18-carat gold open-faced keyless lever dress watch, circa 1920. Frosted gilt movement, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, swan-neck micrometer regulator. Gold hinged cuvette with engraved prize medals. Brushed silver dial with black painted Breguet numerals, outer minute track, inner and outer engraved borders, subsidiary seconds dial, and original blued steel Breguet hands. Solid case, polished, the back decorated with sunray engine-turning. Dial, case, cuvette, and movement signed.
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Diameter: 48 mm
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Signed: Girard-Perregaux Chaux-de-Fonds