Rolex Sea-Dweller in Oystersteel, m136660-0003 | Diamond Cellar
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Why Rolex has a helium escape valve on its Deep Sea's -
Sea-Dweller 'Deepsea', Ref. 116660 | A stainless steel wristwatch with date, bracelet and helium escape valve | Circa 2009 | Fine Watches | 2022 | Sotheby's
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![Rolex] Helium escape valve on a watch on a wrist in the woods. : r/Watches](https://i.redd.it/f6nf1ggz60t41.jpg "Rolex] Helium escape valve on a watch on a wrist in the woods. : r/Watches")
Rolex] Helium escape valve on a watch on a wrist in the woods. : r/Watches
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Why do diving watches need a helium escape valve? - Chrono24 Magazine
