Rolex premiered its first divers? watch, the Submariner, in 1953. The Sea-Dweller, which followed in 1967, had a nearly identical design. But since it was made for professional divers, it had an even more pressure-resistant case and a helium valve developed by Rolex. Rolex released a new model in 2017 to celebrate the Sea-Dweller?s 50th anniversary...
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