The 203 arktis diving chronograph was created in collaboration with mario m weidner one of the most famous extreme divers this partnership suggests that the timepiece is capable of functioning flawlessly in the toughest of conditions it is equipped with valjoux 7750 automatic calibre that performs 28 800 vibrations per hour and has 25 bearing jewels the movement comes with a 42 hour power reserve it is protected from shock and magnetic fields a day and date window is positioned at the 3