Charming Swiss gold and enamel keyless dress watch Circa 1910

Gold open faced lever
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A charming Swiss 18K yellow gold and enamel open faced keyless dress watch, circa 1910. A fine hand-engraved decoration, hinged case back, gold cuvette engraved name, back set with a painted-on enamel of a flower of rose in a glade against a blue translucent enamel background. White enamel dial with black Arabic numerals, outer minute track with five-second red Arabic numerals and pink gold Louis XV hands.
A nickel movement, eight jewels, straight lever escapement, flat balance spring, cut bimetallic compensation balance with timing screws, index regulator.
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Thickness: 10 mm
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Diameter: 31 mm
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Signed: Patek Philippe & Co.  Genève