Model: Speedmaster Professional Retailed by MeisterReference: S105.012-65Date: Circa 1965Movement: 17-jewel Cal.321 manual wind, column wheel chronograph, No.24005006Dial: Black signed Meister, baton hour markers, outer 1/5th second divisions, subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, white pointed baton hands with luminous inserts, centre chronograph handCase: Brushed and polished tonneau form, screw down back, inner cap, crown flanked by twin pushers, black tachymetre to bezel, curved lugsStrap/Bracelet: Brushed Omega 1035 linkBuckle/Clasp: Signed folding clasp, stamped 2 68Signed: Case, dial & movementSize: 42mm Accompaniments: 1056 Omega link bracelet with clasp stamped 3 66