Oris divers small second date is designed for use by professional divers it comes with various safety features and extreme resilience the watch is equipped with oris 643 automatic calibre a modification of eta 2836 2 the movement performs 28 800 vibrations per hour and has 27 bearing jewels a 38 hour power reserve is available for the convenience of the wearer hands indices and bezel elements are covered with luminous paint for enhanced night time visibility a date display is positioned