The Bremont MB was designed and built to become the definitive aviation chronometer in the market place. Tested and designed in conjunction with the iconic British aviation company 'Martin-Baker'. There are two models available - the MBI and the MBII. The MBI is only available to those individuals who have ejected using an MB ejection seat. The movement is protected by an anti-magnetic Faraday cage and a specifically designed anti-shock case mount, designed to withstand the MB ejection seat test programme.