The engineer ii ohio gmt by ball is a chronometer that comes with classical design the timepiece is equipped with eta 2893 2 automatic calibre that is certified by contrle officiel suisse de chronomtres cosc the official swiss institute that tests chronometers hands indices and the second time zone are illuminated through the use of 15 self powered micro gas tubes that glow 100 times brighter than luminous paint the watch is protected from shock magnetic influences and water penetratio