Fine Swiss gold centre seconds keyless lever watch Circa 1911

Gold open faced lever with centre seconds by Patek Philippe
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A fine and unusual Swiss 18 carat gold open-faced centre seconds keyless lever pocket watch made for Henry J.Howe, Syracuse New York, circa 1911. Rhodium-plated movement, Geneva striping decoration, inset barrel arbor, 21 jewels, straight-line moustache lever escapement, adjusted cut bimetallic compensation balance, blued steel Breguet balance spring, cam micrometric regulator. Gold hinged cuvette with presentation inscription Dr Frederick C. Mason from Louise H. Mason 1911. White enamel dial with fancy Arabic numerals, outer minute track with red five-minute numerals and original blued steel spade hands. Polished case. Dial, case and movement signed, movement also signed by retailer, case and movement numbered.
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Diameter: 48 mm
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Signed: Patek, Philippe & Cie Geneva, Switzerland