Swiss 18 carat gold open faced lever dress watch Circa 1913

Gold lever dress watch by Patek Philippe
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A Swiss 18 carat gold open faced keyless lever dress watch, circa 1913.  Retailed by Bailey, Banks & Biddle, Philadelphia. Ultra thin nickel finished Special lever movement, bimetallic compensation balance, wolf’s tooth winding. Engine turned gilt dial, polished chapter ring with Breguet numerals. Monogrammed hinged case back. Case, dial and movement signed by maker, case and movement signed by retailer.
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Diameter: 44.5 mm
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Signed: Patek, Philippe & Co. Geneve