Speedmaster Professional, Ref:145.022, Movement No.39921170, Circa 1978
17-jewel Cal.861 manual wind movement, black dial with luminous baton hour markers, white outer 1/5th second divisions, white pointed baton hands with luminous inserts and centre seconds, subsidiary dials at 3, 6 and 9 for running seconds, 30 minute and 12 hour recording, brushed and polished tonneau shaped case with screw down back, dust cap, black bezel with tachymetre scale, shouldered crown flanked by twin pushers, fitted Omega 1171 link bracelet with signed folding clasp, together with fitted Omega box, outer card, instruction booklet, guarantee and spare link, case, dial and movement signed
42mm.