MK Personal Collection Rare Rolex Steel Cosmograph Ref 6263/6262

MK Personal Collection Rare Rolex Steel Cosmograph Ref 6263/6262. This is a fine men's stainless steel Rolex Daytona Cosmograph with three-body construction case and screwed-down case back, buttons and crown Ref 6263/6264 Serial #4,027,909 and measures 44mm x 41mm including the crown. The watch has a tachometer graduation on the steel bezel to 200 units per hour, bi-colored original black and silver with applied steel bâton indexes, luminous dots, outer minute/seconds track and subsidiary dials for the seconds, the 12-hour and 30-minute registers with luminous steel "bâton" hands, Rolex Cal. 727 rhodium plated 17 jewel movement with straight line lever escapement, monometallic balance adjusted to 3 positions, shock-absorber, self-compensating Breguet balance spring and Microstella regulating screws. The dial, case and movement are signed.