ROLEX REF 6239 COSMOGRAPH DAYTONA STEEL
Rolex, "Cosmograph Daytona" case No. 1626277, Ref. 6239. Made circa 1967.
Very fine and rare, water-resistant, stainless steel wristwatch with round button chronograph,
registers, tachometer and a later stainless steel Rolex Oyster bracelet.
Three-body, polished and brushed, tachometer graduation on the steel bezel to 300 units per
hour, screweddown case back and winding crown.
Black with applied steel baton indexes and luminous dots, outer 1/5th seconds track, subsidiary
guilloche dials for the seconds, the 12-hour and 30-minute registers. Luminous steel baton hands.
Cal. 722-1, rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance,
shock absorber, self-compensating Breguet balance spring, Microstella regulating screws.