TraxNYC on Twitter: "Amazing 24.00 ct Diamond ROLEX Sea-Dweller with Original Gas Escape Valve and Ring Lock System. #Rolex #TraxNYC RT! http://t.co/Q13Z2dtQKB" / Twitter
Rolex Sea-Dweller in Oystersteel, M136660-0004 - Packouz Jewelers
Why do diving watches need a helium escape valve? - Chrono24 Magazine