The ball engineer master ii chronometer timepiece comes with various functionalities and elegant design it is equipped with swiss made eta 2836 2 automatic calibre that is certified by contrle officiel swisse des chronomtres cosc the official institute that certifies precision and accuracy hands numerals and markers are illuminated through the usage of 31 micro gas tubes a day and date display is located at the 3 oclock mark additional functionalities include sweep seconds screwed i