Oris BC4 Retrograde Day has beautiful design and all of the features that distinguish a high quality watch 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 large day and date display is available. Additional useful features include instantaneous day and date, day and date corrector, stop seconds, stainless steel Oris Quick Lock security crown, see-through case back and scratch-resistant sapphire crystal glass with anti-reflective coating.