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
Original Rolex Triplock crown with tube 7mm | eBay
ROLEX - Three dots of the same size on a Rolex screw-down winding crown identifies it as a Triplock in steel, equipped with a triple waterproofness system. www.instagram.com/rolex #Rolex #ThroughTheLoupe | Facebook
Rolex Winding Crown Markings: Crown Symbols & What They Mean - Millenary Watches
Rolex Twinlock vs. Triplock Crowns - What's The Difference?