ROLEX REF 6239 COSMOGRAPH STEEL
Rolex, "Cosmograph," case No. 1079807, Ref. 6239. Made circa 1964.
Very fine and rare, water-resistant, stainless steel wristwatch with round button chronograph, registers,
tachometer and a stainless steel Rolex Oyster bracelet.
Three-body, polished and brushed, tachometer graduation on the steel bezel to 300 units per
hour, screwed-down case back and winding crown.
Bicolor silver and 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. 72B, rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance,
shock absorber, self-compensating Breguet balance spring, Microstella regulating screws.