Racing Heritage The Rolex Cosmograph Daytona is a chronograph built for the world of motorsport. Since its introduction in 1963, it has become synonymous with speed and precision, earning its place as one of the most iconic racing watches ever made. Chronograph Classic This 1997 reference 16523 features a 40mm case in Oystersteel and yellow gold, and is powered by the calibre 4030 automatic movement, offering a power reserve of approximately 55 hours. The Oyster bracelet is fitted with the Oysterlock clasp and Easylink extension system for secure and comfortable wear.