ROLEX REF 6239
COSMOGRAPH DAYTONA STEEL
Rolex, "Oyster Cosmograph Daytona" case No.
1695523, Ref. 6239. Made circa 1967.
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. 722, rhodium-plated, 17 jewels, straight-
line lever escapement, monometallic balance,
shock absorber, self-compensating free-sprung
Breguet balance spring, Microstella regulating
screws.