Born to Race The Rolex Cosmograph Daytona is a chronograph built for precision and endurance. Originally designed for professional racing drivers, it has become an icon of performance and style, with its tachymetric scale and robust construction. Elegance and Precision This 2009 reference 116520 features a 40mm Oystersteel case with a fixed bezel and white dial. The Oyster bracelet with Easylink Oysterlock clasp ensures a secure fit, while the calibre 4130 automatic movement delivers a 72-hour power reserve. A sleek and purposeful chronograph with enduring appeal.