46. Paul Ditisheim, La Chaux-de-Fonds. An 18K gold keyless wind open face chronograph pocket watch Paul Ditisheim, La Chaux-de-Fonds. Chronographe de poche à cadran ouvert en or jaune 18K remontoir au pendant Date: Circa 1910 Movement: Nickel full plate, Swiss lever, cut and compensated bi-metallic balance wheel, column wheel chronograph Dial: White, black Arabic numeral hour markers, black outer 1/5th second divisions with Arabic 5 minutes markers, subsidiary dials at 6 and 12 for seconds and 30 minute recording, blued steel spade hands, centre chronograph hand Case: Polished round, 18K gold cuvette, chronograph pusher button to pendant at 12, No.716244, Signed: Case, dial & movement Size: 52mm Weight: 98,69gr