MWC 300m Water Resistant Stainless Steel Tritium GTLS Navigator Watch

These robust 300m water resistant watches were specifically designed for marine, surface and airborne navigation applications, manufactured to U.S MIL-PRF-46374G specification. The watches all have a 12hr bezel, which offers a very simple and straightforward method to track a second time-zone. The ceramic bezel has high visibility numerals and the dial is also very clear and easy to read even under adverse light conditions. The watch uses Tritium GTLS (Gaseous Tritium Light Sources) which are significantly brighter than any conventional luminous watch.
The timepiece features a high quality NH35A Automatic movement and the watch is designed to withstand high G-forces, the watch is also water resistant to 30 ATM (1000 ft/300m) although it is not a diving watch due to using an entirely different bezel format to permit usage in two time zones it is manufactured to the same water resistance rating as our divers models with screw down crown and caseback. The main difference between this watch and many other models which we manufacture is that it is designed to maintain high levels of accuracy at altitudes up to 12,000m / 40,000ft without compensatory pressurization.
The case is made of stainless steel. The rotating outer bezel provides annotations to enable the watch to show the time in two different time zones.
The crystal is military grade sapphire which is highly scratch resistant with two internal layers of non reflective coating. The dial features a radioactive tritium  symbol. Tritium is a radioactive isotope of hydrogen. When it decays, it emits beta particles although these do not penetrate skin, plastic, glass, etc. Whilst the vials contain radioactive gas even when they are all taken together they contain less than the personal limit of 25 millicuries - see U.S Nuclear Regulatory Commission regulations 10 CFR 30.15.
 
Dimensions and Specification:
300m / 1000ft Water Resistant
Movement: NH35A 24 Jewel Automatic
GTLS Tritium Light Sources
Width: Excluding Crown: 40mm
Width including Crown: 45mm 
Thickness: 14.4mm
Scratch Resistant 120 Click Ceramic Bezel
Crystal Diameter: 30.5mm
Crystal Type: Sapphire with anti reflective coating
Lug to Lug: 48mm
Screwdown crown
Crown 5.5mm
20mm NATO Webbing Strap