The ball engineer ii arabic chronometer is both elegant and very functional the timepiece is equipped with swiss made eta 2836 2 automatic calibre that is certified by contrle officiel suisse de chronomtres cosc the official swiss institute that tests chronometers the movement performs 28 800 vibrations per hour and has 25 bearing jewels hands numerals and indices are illuminated through the use of 31 self powered micro gas tubes that glow 100 times brighter than luminous paint the wa