3038. Patek, Philippe & Co. An 18K gold key wind open face calendar chronograph pocket watch Patek, Philippe & Co. Chronographe de poche à cadran ouvert en or jaune 18K (750) avec date remontoir au pendant Date: Circa 1870 Movement: Gilt Swiss lever, cut and compensated bi-metallic balance, wolf's tooth winding Dial: White, black Roman numeral hour markers, black outer minute track, black outer 1/5th second divisions, subsidiary dials at 3 and 9 for seconds and date, blued steel Breguet style hands, centre chronograph hand Case: Engine turned round, monogram to back, coin edged band, No.27405 Signed: Case Size: 47mm Weight: 101,03g