The bremont alt1 z is a watch designed for the needs of aviators and travellers the z in its name stands for zulu time the wearer has a chance to view local time alongside an official world time standard the watch is equipped with be 54ae automatic calibre that performs 28 800 vibrations per hour and has 25 bearing jewels a 42 hour power reserve is available for the convenience of the wearer other characteristics include glucydur balance anachron balance spring and nivaflex 1 mainspring