The #Rolex Deepsea owes its exceptional strength, waterproofness and pressure resistance to the exclusive Ringlock System. This innovative case... | By ROLEX | Facebook
How Does a Ring Lock System Work? - Crown & Caliber Blog
Rolex DeepSea Triple Ring Lock system | Luxury watches for men, Cool watches, Luxury timepieces
Up Close with the Rolex Deepsea D-Blue (and Explaining the Ingenious Ringlock System) | SJX Watches