The Day-Date 40 is equipped with caliber 3255, a new-generation movement developed and manufactured by Rolex for maximum performance. This self-winding mechanical movement is at the forefront of watchmaking. All of Rolex's technological prowess is poured into it, and it has 14 patents. It sets new standards in terms of the movement's intrinsic values of precision, power reserve, resistance to shocks and magnetism, ease of operation and reliability.





