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
TWINLOCK CASE SCREW TUBE For ROLEX SUBMARINER 5512, 5513 7MM CROWN 24-700 TOP Q | eBay
rolex twinlock
Twinlock Designation - Rolex Forums - Rolex Watch Forum
What is The Difference in Rolex Twinlock vs Triplock?