Rolex has introduced new versions of the Oyster Perpetual Datejust 31, with redesigned case sides and lugs and a range of original dials. Offered in 18k white, yellow or Everose gold, the models have 31-mm cases and are powered by Rolex Caliber 2236, which carries Superlative Chronometer certification. It has a selfwinding module via a Perpetual rotor and a 55-hour power reserve. The screw-down winding crown is fitted with the Twinlock double waterresistance system, water resistant to 100 meters. The scratch-resistant sapphire crystal has a Cyclops lens over the date at 3 o’clock. The watches are fitted on a President bracelet, which has a concealed folding Crownclasp. As shown, in white gold with diamond-set bezel and motherof-pearl diamond-set dial: $44,550.