3033. Vacheron & Constantin. A fine 18K gold keyless wind open face chronograph pocket watch Vacheron & Constantin. Chronographe de poche à cadran ouvert en or jaune 18K (750) remontoir au pendant Date: Circa 1915 Movement: Swiss lever, cut and compensated bi-metallic balance, swan neck regulation, No.358010 Dial: White enamel, heavy black Roman numeral hour markers, black outer 1/5th second divisions, subsidiary dials at 12 and 6 for seconds and 30 minute recording, gilt spade hands, centre chronograph hand Case: Polished hinged round, chronograph button to crown, No.226659 Signed: Case, dial & movement Size: 52mm Weight: 104,97g