Sakasci Diamonds - ROLEX: Twinlock VS. Triplock Crown Twinlock: Water resistant to 330 feet with 2 rubber gaskets that keep dirt, dust and water out of the movement.The Twinlock crown is indicated
Welcome to RolexMagazine.com...Home of Jake's Rolex World Magazine..Optimized for iPad and iPhone: Rolex Submariner Triplock Winding Crown
Secrets of The Rolex Crown: Twinlock vs. Triplock - YouTube