Servicing
This Rolex Daytona Chronograph Ref. 6239 underwent a complete mechanical service, beginning with full disassembly of the Valjoux-based Caliber 722 movement. Each component was carefully cleaned, inspected, and reassembled with high-grade synthetic oils to ensure smooth chronograph operation and long-term reliability. The movement was precisely regulated for accurate timekeeping, and all chronograph functions were tested for proper engagement and reset. The case was cleaned and the pump pushers were disassembled and cleaned in an ultrasonic machine removing years of thick greasy buildup. Notably, the stainless steel case was left unpolished, preserving its original vintage character, with visible wear and patina that reflect the watch’s authentic age and history.
For more information on initiating the repair of your Rolex see getting started. Click on these links for information about our service procedure and rolex servicing in general
History of the Rolex Daytona
The Rolex Daytona Ref. 6239 was introduced in 1963, and was the first Rolex to officially bear the “Cosmograph Daytona” name on the dial, a tribute to the famous Daytona International Speedway in Florida, emphasizing Rolex’s growing association with motorsport.
The 6239 featured a manual-wind Valjoux 72-based movement, originally designated the Rolex Caliber 72B, later upgraded to Cal. 722 and 722-1 in subsequent iterations. It was housed in a 37mm stainless steel case with pump pushers (as opposed to screw-down pushers seen in later models), and most distinctively, featured a tachymeter scale engraved on the bezel rather than printed on the dial.
One of the most famous variants of the 6239 is the so-called “Paul Newman” Daytona”, characterized by exotic dials with contrasting sub-dials and Art Deco-style numerals. Though slow to sell initially, these models later became some of the most sought-after and valuable vintage watches in the world.