Rolex Cosmograph Daytona, Ref. 6239, 1960's. Stainless steel wristwatch with chronograph, registers and tachometer, with President bracelet.

C. massive, polished and satined, tachometer graduations on the bezel. D. bicoloured beige and black with applied steel indexes + auxiliary dials for the 12 hours and 30 minutes registers, and the seconds. "Bâton" hands. M. 13"', rhodiumed, 17 jewels, lever escapement, " glucidur" balance, antishock system, selfcompensating Breguet balance-spring. Dial, case and movement signed. In very good condition. Diam. 36 mm.