Swiss 18K gold open faced keyless lever pocket watch Circa 1910

Gold keyless lever by Patek Philippe
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A very fine Swiss 18 carat gold open faced keyless lever pocket watch, circa 1910. Sold February 15th, 1913. Rhodium-plated movement, 18 jewels, straight-line lever escapement, cut-bimetallic compensation balance, Breguet balance spring. Gold hinged cuvette with inscription. Guilloché champagne-coloured dial, white enamel cartouches with Breguet numerals, outer enamel minute track, subsidiary seconds and original lued steel Breguet hands. Polished case, the back with monogram, reeded concave bezel. Dial, case and movement signed, case and movement numbered. Accompanied by the Extract from the Archives.
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Diameter: 46 mm
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Thickness: 9 mm
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Signed: Patek, Philippe & Co. Geneva, Switzerland