Why Rolex has a helium escape valve on its Deep Sea's -
The Helium Escape Valve - Everything You Need to Know | Bob's Watches
Rolex Deepsea Sea-Dweller 44mm Steel Black Dial Automatic Mens Watch 116660 - Walmart.com
Rolex Genuine & Rare Sea-Dweller 16600,16660 watch Part Helium Escape Vacuum Valve 24-V53-2 New
Military Royal Navy Clearance Diver Deepsea Sea-Dweller, Ref. 116660 Stainless steel wristwatch with gas escape valve, date and bracelet Circa 2013 | Fine Watches Including Masterworks of Time, Collector's Watches | 2021 | Sotheby's