The Sea-Dweller. Created in 1967 for the diver’s safe descent and the watch’s safe return. During decompression, the helium escape valve releases expanding helium from the case, protecting the crystal and movement. Another descendant of the 1926 Oyster, our first waterproof wristwatch, the Sea-Dweller carries that legacy to 1,220m (4,000ft). In Oystersteel, 43mm, calibre 3235. #Rolex #SeaDweller #OysterStory