![Hands-On: The Most Important (Rolex) Dive Watch – Vintage Rolex and other iconic timepieces under the loupe at Perezcope Hands-On: The Most Important (Rolex) Dive Watch – Vintage Rolex and other iconic timepieces under the loupe at Perezcope](https://watchengines.files.wordpress.com/2018/10/181011-rolex-gas-escape-valve-patent-1967.jpg)
Hands-On: The Most Important (Rolex) Dive Watch – Vintage Rolex and other iconic timepieces under the loupe at Perezcope
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 Sea-Dweller, ref. 116660 Stainless steel wristwatch with date and helium escape valve Circa 2009 | Important Watches: Part II | 2022 | Sotheby's](https://sothebys-md.brightspotcdn.com/12/79/5c74379b4260b1adec7fb3588e47/ge2211-c7j5y-01.jpg)