Isobrite T100 Tritium Slim Blue Watch

Available exclusively on Massdrop, this Isobrite Grand Slimline Watch Set from ArmourLite includes a Grand Slimline T100 tritium watch and a host of extras to prepare you for the field. The dial features bright markers containing tritium—an isotope of hydrogen that glows in the dark for up to 50 years. The ultra slim stainless-steel case is fitted with a scratch-resistant sapphire crystal with anti-reflective coating. This version is made with T100 tritium illumination, which is four times brighter than the T25 variety used in most standard tritium watches. Manufactured by Switzerland’s mb-microtec, these tritium markers are currently the brightest and longest-lasting in the world.

Outfitted with a Swiss-made Ronda 715 quartz movement, the Grand Slimline is both accurate and precise. Tritium-illuminated Arabic numerals at 6 and 12 o’clock help with visibility, while a window between 4 and 5 o’clock keeps track of the date. While the watch comes preinstalled with a stainless-steel band, this exclusive set includes three extra wristbands (2 nylon & 1 leather), a spring bar pin tool, and a case for storage. The watch is backed by a 2-year warranty.

Based in Miami Beach, Florida, ArmourLite Watch Company produces tritium-illuminated watches for military and law enforcement personnel, first responders, and rugged outdoorsmen. The first-ever manufacturer to combine shatterproof glass construction with tritium illumination, ArmourLite creates watches that offer the ultimate combination of accuracy and reliability.