Elegant Swiss 18K gold open faced lever watch Circa 1911

Gold gentlemen’s watch
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An elegant Swiss 18 carat gold open faced pocket watch, circa 1911. The movement with a lever escapement. White enamel dial with Arabic hour numerals, an outer minute track, sunk subsidiary seconds at 6 o’clock and blued spade & whip hands. The plain case is engraved For Grandfather’s 70th Birthday, September 15, 1912, on the inside of the back. Dial signed, case and movement numbered.
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Diameter: 48 mm
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Weight: 75.5 g
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Signed: Patek, Philippe & Cie Genève