Rolex started to launch Cosmograph Daytona series in 1937, and it used a Valjoux movement, but at the time and the next several decades, it did not cause much attention, and the sales also was only mediocre. In 1963, the rolex updated and renamed it as Cosmograph oyster chronograph (Ref.6239 adopted the Valjoux 72 movement), and the biggest difference of its appearance was that it directly engraved the speed meter (tachymeter) in the outer of the watch bezel, rather than on the traditional dial.

Because the Cosmograph brings together various performance of modern professional sport watches, including oyster type waterproof design, Unibody mechanical movement timing, oyster type folding buckle strap, and the bezel design that can instantly know the average lap speed, so it quickly enjoyed the popularity between racing drivers. There is a legend, rolex so that named the watch as Cosmograph Daytona with the Florida's car resort Daytona Beach; Another saying is that the origin that the name of Daytnoa comes from a different story: when the rolex made the Cosmograph oyster type chronograph, it coincided with the opening of the United States Daytona motor racing, rolex sent the Cosmograph timing chronograph to compete for the appointed timing  specify the timing instrument of the conference and it was successfully elected in the end, so rolex vendors make this series name replica rolex daytona.

Everrose gold and black Cerachrom word bezel: Cosmograph Daytona Ref.116515LN

The Cosmograph Daytona Ref.116515LN launched in the year of 2011 is equipped with two Rolex unique features: first one is that the watch case adopts the Rolex patented Everrose Gold material, and the second one is that it applies the patented Cerachrom word bezel, and this high-tech ceramic can efficiently prevent loss and has the resistance to erosion and permanently keeps shining. The cerachrome word bezel of the Cosmograph DaytonaRef.116515LN is adhering to the design of the model that was made in 1965 with the branded new black appearance and the composed style.