OROLOGIO DA POLSO DA UOMO ROLEX CHRONOGRAPH REF. 6238 "PRE-DAYTONA", 1966 CIRCA

MEN’S WRISTWATCH ROLEX CHRONOGRAPH REF. 6238 "PRE-DAYTONA", 1966 CIRCA
Three body tonneau Oyster steel case, n. 1207251, concave lugs, pump button and Twinlock crown, screed back with serial 6238. Rolex Oyster riveted steel bracelet for American trade-market.
Soleil silvered dial, signed "Rolex Chronograph”, Rolex crown at “12”, applied bâton indexes side by side with tritium dots, outer minutes and 1/5 seconds chronograph division, sunk subsidiary dial for small seconds, 30-min and 12-hour registers with concentric engravings, outer tachymetric scale. Luminous bâton hands.
Manual movement, signed "Montre Rolex S.A.”, caliber 722, rhodium-plated, 17 jewels, lever escapement, monometallic balance with Microstella regulating screws, self-compensating Breguet hairspring, KIF Elastor shock-absorber.
Diameter Ø: 36 mm
Note: working.