The Cosmograph Daytona was introduced in 1963. It was projected to meet the demands of the professional racing drivers. The success of Daytona is tied to a legendary personality in the sport world, Sir Malcolm Campbell, also known as The Speed King, who was selected to be the first Rolex Ambassador. In his Blue Bird race cars, Sir Malcolm Campbell set several land-speed records both in Europe and at a racetrack in a little-known Florida city called Daytona Beach wearing Rolex Daytona on his wrist. The Cosmograph Daytona 126508 is presented with a 40mm 18k yellow gold case, screw-down crown with triplock triple waterproofness system and see-through case back. Its black dial features a central sweep seconds hand allowing an accurate reading of 1/8 seconds, while the two counters on the dial display the elapsed time in hours and minutes. The combination of its dial features and it fixed tachymetric scale, also in 18k yellow gold, allows drivers to measure their average speed (up to 400 kilometers per hour) and to accurately map their track times and tactics with extraordinary precision. Additionally the Daytona 126508 Chronograph is water resistant to 100 meters. Comopared to its previous model, the Daytona 126508 has an updatd Calibre 4131, accurate up to +/- 2 seconds per day and boasts a 72 hour power reserve. The Daytona 126508 18k yellow gold oyster bracelet not only shows the elegance delivered by Rolex tradition, but also is the reason for its amazing comfort and durability. It also features a folding Oysterlock safety clasp with Easylink 5 mm comfort extension link. Overall the Rolex Daytona 126508 is a very attractive luxury chronograph for any horological enthusiast. All these characteristic make the Daytona 126508 an iconic watch eternally joined in name and function to the high‑performance world of motorsport.