The b 42 flieger black chronograph alarm chronometer is a limited edition timepiece solely 500 such watches are available for purchase it is equipped with f 2001 5 automatic calibre that is certified by contrle officiel suisse des chronomtres cosc the swiss institute that tests chronometers the movement performs 28 800 vibrations per hour and has 35 bearing jewels other characteristics include incabloc shock absorber and two barrels hands numerals and indices are covered with lumino