Swiss unusual silver and yellow gold pocket watch Circa 1899

Silver and gold pocket watch with open face by Patek Philippe & Co.
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An extremely fine and rare and unusual, silver and yellow gold, keyless Swiss pocket watch, circa 1899.
Gold applied crown on the silver engine turned case back. Enamel dial with Roman radial hours, outer minutes track with Arabic five minutes numerals, subsidiary dial for the seconds, and blued spade hands. 2/3 Plate movement, frosted and gilt, with an applied winding mechanism, wolf teeth winding wheel, screw compensation balance and counterpoised Moustache lever. Signature on the case, dial and movement. And accompanied by an original Patek Phillipe box and certificate.
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Diameter: 32 mm
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Signed: Patek Philippe & Cie. Genève