Oris bc3 sportsman day date is updated version of one of the most popular oris timepieces for aviators it 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 above the 6 oclock position additional useful features include stop second screw in security crown see thro