ROLEX REF 6263 COSMOGRAPH DAYTONA BLACK SIGMA DIAL STEEL
Rolex, "Oyster Cosmograph, Daytona", case No. 5382658, Ref. 6263. Sold on December 20, 1978.
Fine and very rare, water-resistant, stainless steel wristwatch with black bezel, round button chronograph,
registers, tachometer and a stainless steel Rolex Oyster bracelet Ref. 78350. Accompanied by the original
Rolex box, stamped and dated guarantee, Rolex sales tag, 2012 service receipt and 2014 Rolex international
service warranty.
Three-body, polished and brushed, screwed-down case back, buttons and Triplock winding
crown, tachometer graduation on the acrylic bezel to 200 units per hour.
Bicolor black and silver with applied white gold baton indexes and luminous dots, outer 1/5th
seconds track, subsidiary guilloché dials for the seconds, the 12-hour and 30-minute registers.
White gold luminous baton hands.
Cal. 727, rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance with
Microstella regulating screws, adjusted to 3 positions, shock absorber, self-compensating Breguet
balance spring.