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By May 26, 2022October 14th, 2022Glossary - Rolex

Helium Escape Valve

Safety valve patented by Rolex in 1967 for divers’ watches designed for deep-sea diving. The helium escape valve allows excess pressure that builds up inside the watch case to be released during a diver’s decompression phase in a hyperbaric chamber. It features on the Rolex Sea-Dweller and Rolex Deepsea.