3010. J.W. Benson, London. An 18K gold keyless wind split second chronograph open face pocket watch Date: Circa 1910 Movement: Swiss lever, cut and compensated bi-metallic balance, column wheel chronograph, sugar tong split seconds mechanism Dial: White, black Arabic numeral hour markers, black outer minute track and 1/5th second divisions with 5 minute markers, subsidiary dials at 12 and 6 for 30 minute recording and seconds, gilt spade hands, gilt centre chronograph hand, blued steel split seconds hand Case: Polished round, chronograph button to crown, split seconds button at 2, No.32173 Signed: Dial Size: 52mm Weight: 100,74g