ROLEX REF. 6239 COSMOGRAPH DAYTONA STEEL
Rolex Cosmograph, Daytona, case No. 1781577, Ref. 6239.
Made circa 1967.
Very fine and rare, water-resistant, stainless steel wristwatch with round button chronograph, registers, tachometer,
steel bezel graduated to 200 UPH and a stainless steel Rolex
Oyster bracelet. Accompanied by a box and service papers.
Three-body, polished and brushed, screw-down case
back and crown, tachometer on the bezel graduated to 200
units per hour, case back engraved with a dedication.
Bicolor black and silver with applied faceted steel baton
indexes and luminous dots, outer 1/5th seconds track,
subsidiary silver guilloche dials for the seconds, the 12-hour
and 30-minute registers. Luminous steel baton hands.
Cal. 722, rhodium-plated, 17 jewels, straight-line lever
escapement, monometallic balance adjusted to 3 positions,
shock absorber, self-compensating free-sprung Breguet
balance spring, Microstella regulating screws.