As the only chronograph in the Rolex line-up, the Rolex Daytona, or correctly Oyster Perpetual Cosmograph Daytona, was designed in 1976. The Rolex Daytona was named in honour of the racing drivers who competed on the famous race-track in Florida, USA, and who appreciated its easily readable dial. Rolex and Daytona have enjoyed a privileged relationship since the International Speedway opened in 1959, sharing a unique preoccupation with the finer points of split-second timing. Paul Newman had a special Daytona dedicated to him as he has helped to make the watch world-famous as a film actor. The movement is automatic, i.e, selfwinding, and the automatic movement has a power reserve of up to 72 hours and a frequency of 28,600 vibrations per hour. The Daytona is waterproof up to 330 feet / 100 meters of depth as the sapphire crystal is virtually unbreakable. The Oyster Perpetual Cosmograph Daytona is 13mm thick and has a diameter of 42mm with its crown.