Swiss gold and enamel open faced pendant watch Circa 1850

Keywound pendant watch by Patek Philippe
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A Swiss 18 carat gold and enamel open faced keywound pendant watch, circa 1850. Gilt finished movement. White enamel dial with Roman numerals. Gold cuvette. Case back with a painted polychrome enamel scene of a Shepherdess in a pastoral landscape framed by translucent blue enamel over engine turning, engraved band. Cuvette and movement signed, associated gilt metal chatelaine.
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Diameter: 37 mm
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Signed: Patek, Philippe & Co Genève