Oris tt1 day date is inspired by the achievements of the att williams formula 1 team this timepiece is equipped with oris 735 automatic calibre that performs 28 800 vibrations per hour and has 26 bearing jewels a 38 hour power reserve is available for the convenience of the wearer hands and indices are luminous for improved night time visibility a day and date display appears at the 3 oclock mark additional useful features include ceramic top ring stainless steel crown see through case