Swiss 9k gold half hunting cased lever watch Circa 1920-1921

Gold half hunter by Rolex
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A fine Swiss 9 carat gold half hunting cased keyless lever pocket watch, circa 1920-1921. Rhodium plated movement, oeil-de-perdrix decoration, 15 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Gold hinged cuvette. Off-white enamel dial with black Roman numerals, outer minute track, subsidiary seconds and original blued steel double pear hands.  Plain case by Wilsdorf & Davis, polished, glazed aperture to the front and black champlevé enamel Roman numerals. Dial and movement signed Rolex, case with Wilsdorf & Davis mark, case with London import marks for 1920-1921.
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Diameter: 51 mm
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Signed: Rolex