Model: CosmographReference: 6240/6239Date: Sold 24th December 1965Movement: 17-jewel Cal.722 Valjoux manual wind, column wheel chronographDial: Sunburst silvered, applied baton hour markers, black outer 1/5th second divisions with luminous five dot markers, black sunken subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, polished baton hands with luminous inserts, centre chronograph handCase: Brushed and polished tonneau form, screw down back stamped C.R.S inside, screw down crown flanked by twin screw down Millerighe pushers, fixed bezel with black calibrated insert, No.143****Strap/Bracelet: Fitted steel 6635 folded Oyster link, end links stamped '71'Buckle/Clasp: Signed folding clasp, stamped '2 63'Signed: Case, dial & movementSize: 37mm Accompaniments: Rolex box, guarantee, jeweller's guarantee