MWC "Submariner / Naval Crew Divers Watch" in Covert Black PVD 500m (1,640ft) Water Resistant Dual Time Zone Military Watch in PVD Stainless Steel Case with GTLS and Helium Valve strao hence the high-visibility orange strap

hence the high-visibility orange strap

Featuring a significantly more robust case than most other military dive watches

impact resistant and dustproof

Caseback: 316L stainless steel

Helium molecules can build up inside the watch

MWC "Submariner / Naval Crew Divers Watch" in Covert Black PVD 500m (1,640ft) Water Resistant Dual Time Zone Military Watch in PVD Stainless Steel Case with GTLS and Helium Valve strao hence the high-visibility orange strapSKU: 500M SUBC PVD The MWC "Naval Crew" range of Military Divers models represents one of MWC's latest heavy duty series, available in two versions: covert non reflective PVD steel and standard stainless steel. These watches are specifically designed for demanding environments, using red T100 tritium GTLS tubes to preserve night vision on a ship's bridge or in a submarine. Submarines are typically 'rigged for red' to allow periscope use at night,