Swiss 18 carat gold open faced keyless ladies’ watch Circa 1885

Gold miniature pocket watch 
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A very fine Swiss 18 carat gold open faced keyless pocket watch made by Patek Philippe in Geneva in the 1880s. The gilt brass bridge caliber movement with 10 jewels, a cylinder escapement, three arm monometallic balance, blued steel flat balance spring and an index regulator. Porcelain dial with black Roman hours, an outer minute track, outermost red Arabic five minute numerals and original blued steel spade hands. The solid, polished case with an engraved hinged back and further hinged gold cuvette. Dial, case, cuvette and dial signed, movement numbered.
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Diameter: 31 mm
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Thickness: 10 mm
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Signed: Patek, Philippe & Co Genève