The new Rolex Oyster Perpetual Replica Watches is very user-friendly. The crown is easy to unscrew and has only two positions: one for winding; the other for setting the time. A stop-seconds mechanism stops the balance, immobilizing the hands for easy to-the-second setting. The line under the Rolex “crown” logo on the winding crown marks it as the Twinlock type, which helps make the Rolex Oyster Perpetual Replica Watches water-resistant to a depth of 100 meters.