Enduring Performance The Cosmograph Daytona has long been associated with speed and endurance. Its chronograph functions and tachymetric scale make it a trusted companion for measuring elapsed time and calculating average speeds. Racing Daytona This 2016 reference features a white dial with contrasting sub-dials, housed in a 40mm case crafted from a blend of Oystersteel and yellow gold. The fixed bezel and Oyster bracelet with Easylink Oysterlock clasp complete the look. Inside, the calibre 4130 automatic movement delivers a 72-hour power reserve.