Patek Philippe. An 18k Gold and Enamel Openface Keyless Lever Dress Watch with Breguet NumeralsSigned Patek Philippe & Cie, Retailed by W. F. Seller & Co, Altoona, Pa., Movement No. 812'746, Case No. 412'379, Manufactured in 1926Cal. 17''' nickel-finished lever movement, double stamped with the Geneva seal, 18 jewels, bimetallic compensation balance, swan neck regulator, wolf's tooth winding, gold cuvette, silvered matted dial Breguet numerals, engine-turned subsidiary seconds, circular polished case, monogramed back, the bezel, rim, band and bow with blue and black enamel border with engraved beading, case, cuvette, dial and movement signed by maker, cuvette and movement signed by retailer45mm diam.