Racing Spirit The Rolex Cosmograph Daytona is a chronograph built for the world of motorsport. Since its introduction in 1963, it has become an icon of speed and precision, known for its robust construction and instantly recognisable design. Sporting Elegance This 2011 reference 116523 features a 40mm case crafted from a combination of Oystersteel and yellow gold. It is powered by the calibre 4130 automatic movement, delivering a power reserve of approximately 72 hours. The Oyster bracelet includes the Oysterlock clasp and Easylink extension system.