This is the watch requested by the U.S. Navy SEALs for its unique illumination technology. Identified as a vital element for maintaining light discipline, borosilicate glass capsules with phosphor-lined interiors make up the watch’s 12 hour positions and its hour, minute, and second hands. Tritium gas sealed within each capsule reacts with the phosphor lining, causing it to fluoresce for more than 25 years without the need for a recharge from a light source. The watch’s case is made from carbon-reinforced polycarbonate while the screw-in case back is made from stainless steel. It has a carbon-reinforced ratcheting, unidirectional polymer bezel for measuring elapsed time and a push-in stainless steel crown with double O-rings to ensure its water resistance down to 660'. The Swiss quartz movement provides impeccable timekeeping for on-the-second synchronization. The face is protected by a tempered, scratch-resistant mineral crystal. Its black rubber (NBR) strap defies seawater, slush, rain, or snow. Case 1 3/4" Diam. x 1/2" D. (2 3/4 oz.)