Cosmograph, Ref:6263, Serial No.413****, Sold July 1978
17-jewel Cal.727 manual wind movement with column wheel chronograph, silvered dial with applied polished baton hour markers, black outer 1/5th second divisions with luminous dot five minute markers, polished baton hands with luminous inserts and black arrow tipped centre chronograph hand, sunken matt black 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 Oyster back, screw down crown flanked by screw down chronograph pushers, fixed bezel with gloss black units per hour calibrated insert, fitted brushed Oyster 78350 link bracelet with 571 end links and signed folding clasp, together with fitted Rolex box, guarantee certificate, leather wallet and spare black 6263 Daytona dial, case, dial and movement signed
37mm.