The DNA of the U-2 chronometer lies firmly with the military following the pioneering development and dramatic success of the Bremont military air-crew watch, developed in association with Martin-Baker. The elite 9th Reconnaissance Wing at Beale wanted a watch with the same testing history as the Bremont MB but one that had also been custom-tested to their own requirements. The finished U-2 chronometer has most of the advanced elements of the MB, including; the Anti-shock rubberised movement mount; designed to withstand the MB ejection seat program, but also added functionality. Stainless steel bracelet and additional Nylon Nato Strap