It Developed longer electric power reserves and more accurate timing by making use of a technique of clutches, ratchets and an oscillating weight that might rotate 360 degrees. The Rolex Oyster Perpetual was ready to wind itself from the wearer's actions. The Rolex Datejust Nordgreen’s watches can be found in https://www.watchesworld.com/11-of-the-best-womens-watches/