ROLEX - Helium escape valve opens when the difference in pressure between the inside and outside of the watch reaches 3 to 5 bars, allowing helium to escape, thereby protecting the watch. #
Sea-Dweller, ref. 116660 Stainless steel wristwatch with date and helium escape valve Circa 2009 | Important Watches: Part II | 2022 | Sotheby's
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![Rolex] Helium escape valve on a watch on a wrist in the woods. : r/Watches](https://preview.redd.it/f6nf1ggz60t41.jpg?width=640&crop=smart&auto=webp&s=5d17b94ea4d88ddc713eef9f2fd10b76300a3a2a "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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Submariner 'COMEX', Ref. 5513 with helium escape valve | A stainless steel wristwatch with bracelet | Circa 1971 | Fine Watches | 2022 | Sotheby's
