An 18ct. gold open faced keyless lever pocket watch, Patek Philippe, No.138600, circa 1905,

细节
An 18ct. gold open faced keyless lever pocket watch, Patek Philippe, No.138600, circa 1905,
white enamel dial signed Patek Philippe & Cie, Geneve, Arabic numerals, outer Arabic 24-hour numerals, subsidiary seconds, pierced gold hands, damascened nickel plated Adjusted Extra movement signed Patek Philippe & Cie, No.138600, Geneve, Suisse, jewelled to the centre and with wolf's tooth winding, bimetallic compensation balance with blued steel spiral hairspring with overcoil, micrometer adjustment to the regulator, diamond endstone, signed and numbered gold cuvette, engine turned case stamped P.P.Co., diameter 49mm.
See Colour Illustration (Plate 1)