MWC "Submariner / Naval Crew Divers Watch" 500m (1,640ft) Water Resistant Dual Time Zone Military Watch in a Stainless Steel Case with GTLS and Helium ValveSKU: 500M SUBC SS The MWC "Naval Crew" range of Military Divers models is part of MWC's latest heavy duty collection, featuring two variants: one with a stainless steel finish and the other in covert non reflective PVD steel. These watches are equipped with red T100 tritium GTLS tubes, ideal for preserving night vision on a ship's bridge or in a submarine. Submarines are typically 'rigged for red' to allow the use of the periscope at night, dusk, and