Swiss yellow gold open faced keyless lever watch Circa 1899

Yellow gold lever by Patek Philippe & Co.
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A Swiss 18-carat gold open faced keyless lever watch, circa 1899.
Gilt finished jewelled lever movement, bimetallic compensation balance, wolf’s tooth winding. 18-carat yellow gold cuvette. White enamel dial with Roman numerals, outer railway minute divisions, subsidiary seconds, and gold spade hands. Plain case. Case, cuvette, dial and movement signed. Accompanied by an original box and certificate.
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Diameter: 49 mm
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Signed: Patek Philippe & Cie Genève