Rolex. Beau chronographe bracelet en acier mouvement mécanique Rolex. A fine stainless steel manual wind chronograph bracelet watch Chronograph 'Pre-Daytona', Ref 6238 , Circa 1964Rolex. Beau chronographe bracelet en acier mouvement mécaniqueRolex. A fine stainless steel manual wind chronograph bracelet watch Model: Chronograph 'Pre-Daytona'Reference: 6238 Date: Circa 1964Movement: 17-jewel Valjoux Cal.722 manual windDial: Sunburst silvered, applied polished baton hour markers, black outer 1/5th second divisions with luminous dot 5 minute markers, black outer tachymetre scale, sunken engine turned subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, polished baton hands with luminous inserts, arrow tipped black centre chronograph handCase: Brushed and polished tonneau form, screw down back, screw down crown flanked by twin pushers, No.1077786Strap/Bracelet: Black leatherBuckle/Clasp: Signed folding clasp, stamped N2/78360Signed: Case, dial & movementSize: 35mmIntroduced in the early 1960s and available until 1967, the Rolex chronograph reference 6238 is better known as the "Pre-Daytona". It was the transition model between the earlier non-Oyster cased Rolex chronograph and the Daytona model. Although the 6238 was available in stainless steel, 14K and 18K gold, the watch is rarer seen in gold, as it only remained in the Rolex catalogue for a brief period of time.