40. An 18K gold keyless wind open face split second chronograph pocket watch Chronographe de poche à cadran ouvert en or jaune 18K (750) remontoir au pendant et fonction rattrapante Date: Circa 1910 Movement: Swiss lever, nickel full plate, cut and compensated bi-metallic balance wheel Dial: White, black Arabic numeral hour markers, black outer minute track, black outer 1/5th second divisions with red Arabic 5 minute markers, sunken subsidiary dials at 6 and 12 for constant seconds and 30 minute recording, blued steel spade hands, centre split second and chronograph hands Case: Polished hinged round, chronograph button through the crown, split second button in band, No.80101 Size: 49mm Weight: 113,19g