This chronograph by oris comes with an all black dial and various complications oris bc4 chronograph is equipped with oris 674 automatic calibre a modification of eta 7750 the movement performs 28 800 vibrations per hour and has 25 bearing jewels a 42 hour power reserve is available for the convenience of the wearer hands and indices are luminous for improved night time visibility the chronograph of the watch comes with a 14 second centre hand as well as with a 60 second a 30 minute and