ROLEX REF 6239 COSMOGRAPH DAYTONA STEEL
Rolex, "Cosmograph Daytona", case No. 1193398, Ref. 6239. Made circa 1959.
Very fine and rare, water-resistant, stainless steel wristwatch with round button chronograph, registers,
tachometer and a stainless steel Rolex buckle.
Three-body, polished and brushed, tachometer graduation on the steel bezel to 200 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.