Swiss gold and enamel Patek Philippe pocket watch Circa 1910

Gold open faced watch
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A Swiss fine and small 18K gold, enamel and diamond set keyless wind open face pocket fob watch, circa 1912. Gilt Swiss lever, cut and compensated bimetallic balance.
White enamel dial, black Arabic numerals, black outer minute track with red Arabic numeral 5-minute markers, gilt Louis XV style hands.
Polished round case with blue guilloché enamel and rose-cut diamond decoration. Case, dial, movement and cuvette signed.
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Diameter: 27 mm
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Signed: Patek Philippe & Cie. Genève