These watches are fitted with self-winding automatic movements, however they can also be manually wound through the winding crown. All Sub models have screw-down crowns, which means that before you can wind the watch, you will first need to unscrew it from the case. To wind a Rolex Submariner, first unscrew the crown and then rotate it in the clockwise direction. Since Submariner watches have automatic winding movements, you will not reach a natural stopping point, but after about 30-40 rotations, the mainspring will be fully wound.