Oyster Perpetual Day-Date 40

Rolex presents its iconic Oyster Perpetual Day-Date with a fresh aesthetic and a new-generation mechanical movement, Calibre 3255, inside a 40 mm case. From a design perspective, this new Day-Date features refined lugs and case middle, a large dial opening, and an exclusive return to the President bracelet that is more closely integrated into the Oyster case. The movement has COSC certification (Contrôle Officiel Suisse des Chronomètres) yet in fact complies with precision criteria that are twice as exacting. It incorporates the patented Chronergy escapement which combines high energy efficiency with dependability. Made from nickel-phosphorus, it is also insensitive to magnetic interference. The oscillator has an optimised blue Parachrom balance spring. New barrel architecture and the escapement's greater efficiency ensure a power reserve of 70 hours.