Chronograph Icon The Rolex Cosmograph Daytona is a symbol of precision and endurance. Designed for the demands of motorsport, it combines technical performance with a bold, recognisable aesthetic that has made it a legend among chronographs. Racing Daytona This 2006 reference 116523 features a 40mm case in Oystersteel and yellow gold, and is powered by the calibre 4130 automatic movement, offering a power reserve of approximately 72 hours. The Oyster bracelet is secured with the Oysterlock clasp and Easylink extension system.