This is the watch worn by U.S. Air Force pilots flying the F-117 Nighthawk. Requested by stealth fighter pilots for its illumination technology, 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 12-hour bezel rotates to keep track of the time in a different time zone, an additional 24-hour dial tracks military time, and a window provides the date. The watch's bezel, case and screw-on case back are made from black, PVD-plated brushed 316L stainless steel. A screw-down stainless steel crown with double O-rings ensures water resistance down to 660'. Swiss quartz movement provides impeccable timekeeping for on-the-second synchronization. The face is protected by an anti-reflective, scratch-resistant sapphire crystal. Black polyurethane strap. Case 1 3/4" Diam. x 1/2" D. (2 oz.)