Triplock Winding crown

Model of the Triplock Winding crown

Sea-Dweller 4000 steel Oyster

GMT-Master II white gold Triplock Winding crown

Cosmograph Daytona platinum Triplock Winding crown

Winding crown of Rolex

The Triplock winding crown is a patented triple waterproofness system designed especially for divers’ watches. Developed by Rolex, it resists water pressure to depths of 300 metres (1,000 feet) on the Submariner models and some other Professional models, and 3,900 metres (12,800 feet) on the Rolex Deepsea. First introduced in 1970, the Triplock system consists of 10 different elements crafted from the most reliable materials. The winding crown screws down against the Oyster case as tightly and hermetically as a submarine’s hatch.