Swiss 18 carat gold open faced keyless pocket watch Circa 1889

Gold lever watch with original box and certificate
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A fine Swiss, 18K gold keyless pocket watch, circa 1898. Accompanied by the original box and certificate. An engine-turned case with a reeded and polished bezel and border. Hinged gold cuvette. White enamel dial with radial Roman numerals, outer minute track and Arabic five-minute numerals, subsidiary seconds. Blued steel spade hands.
A matte gilt movement, 15 jewels, wolf’s tooth winding, straight-line moustache lever escapement, cut bimetallic compensation balance, blued steel flat balance spring, index regulator. Dial, case, cuvette and movement signed.
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Diameter: 49 mm
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Signed: Patek Philippe & Co  Genève
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The case is slightly worn.