Fortis watch b 42 flieger chronograph alarm6571011 lc 01 this is the worlds first and only mechanical alarm b 42 flieger chronograph alarm is a limited edition timepiece that is equipped with swiss made f 2001 5 automatic calibre that performs 28 800 vibrations per hour and has 35 bearing jewels the movement is certified by control officiel suisse des chronometres cosc the swiss institute that tests chronometers other characteristics include incabloc shock absorber and two barrels hand