Rolex introduces the new Calibre 3255, a new-generation mechanical movement with 14 patents. Among many noteworthy items, Rolex is quick to point out that the Calibre 3255 sets a new level of chronometric precision with criteria surpassing those of COSC (the Swiss Official Chronometer Testing Institute). Rolex has developed a new methodology and high-technology equipment to test the precision of its Superlative Chronometers with tolerances that are twice as exacting as those for official certification, and under conditions that simulate the wearer’s real-life experience. Somewhat analogous to the “Patek Philippe developing its own in-house “Seal”, these exclusive Rolex chronometer tests complement the official COSC certification, to which all Rolex movements continue to be submitted systematically, and are carried out not on the movements alone, but on the assembled watches after the movements have been cased.
The 3255 incorporates the new Chronergy escapement patented by Rolex, which combines high energy efficiency with great dependability. The oscillator has an optimized blue Parachrom hairspring, which is also up to 10 times more precise than a traditional hairspring in case of shocks. Thanks to a new barrel architecture and the escapement’s superior efficiency, the power reserve of calibre 3255 extends to three days, which means a Rolex watch with the Cal 3255 can easily handle some weekend off-wrist time. The first watch to receive the new Calibre 3255 is the Oyster Perpetual Day-Date 40, featuring a modernized design with a 40mm case, available in a range of emblematic new dials. Here is the Day-Date 40 in platinum case, with very attractive, laser-etched blue dial: