The Helium Escape Valve - Everything You Need to Know | Bob's Watches
Why do diving watches need a helium escape valve? - Chrono24 Magazine
Deepsea Dive D Blue dive watch | Rolex | The Jewellery Editor
The Helium Escape Valve: Essential or Irrelevant? - Everest Horology Products
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. #
Second Opinions on whether or not the helium escape valve should be used in modern dive watches
The Helium Escape Valve - Everything You Need to Know | Bob's Watches