Track Proven The Rolex Cosmograph Daytona is a chronograph designed for high-performance timekeeping. Its legacy in motorsport and instantly recognisable design have made it a benchmark in the world of racing watches. Sporting Contrast This 2012 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 includes the Oysterlock clasp and Easylink extension system.