Rolex Daytona 6239 Blue Daytona, `60sStainless steel round case, n.2011241, stainless steel bezel, round pushers. Black dial, argenté counters, blue Daytona writing, applied indexes. Hand-winding movement, cal. 722. Stainless steel Oyster bracelet with riveted links. Size: 37 mm. Accompanied by Rolex warranty and vintage box. Notes: Reference 6239 was the very first Cosmograph Daytona introduced by Rolex, launched in 1963 and in production until around 1972. It was the brand’s first chronograph with the tachymeter scale engraved on the bezel. The watch offered in this catalogue represents one of the most rare and desired versions by collectors, with the Daytona writing featuring a blue color: a defect in the pigment has turned the signature, which was originally printed in white, to an attractive light blue shade, a phenomenon that may occur only in specimens in the 2-million serial range. The watch is further accompanied by its original warranty and vintage box.