The first version, fitted on an Oysterflex bracelet, features a dial in white mother-of-pearl with chronograph counters in black mother-of-pearl. The colour combination is reversed on the second watch, which has an Oyster bracelet and a black mother-of-pearl dial with white mother-of-pearl counters. This design called for the creation of a specific and technically demanding manufacturing process.
The Cosmograph Daytona is equipped with calibre 4131, entirely developed and manufactured by Rolex, which features bridges decorated with Rolex Côtes de Genève and a cut-out oscillating weight. Calibre 4131 enables the Cosmograph Daytona to measure intervals of time via the chronograph function, in addition to displaying the hours, minutes and seconds.