The design of the BR 01-92 Heritage is inspired by the legibility and functionality of aeronautical instruments. It is equipped with Swiss-made ETA 2892 automatic calibre that performs 28 800 vibrations per hour and has 21 bearing jewels. A 42-hour power reserve is available for the convenience of the wearer. Hands, numerals and indices are covered with luminous paint that increases readability in the dark. Other useful features include screw-in crown, steel case with matte PVD finish and scratch-resistant sapphire crystal glass with anti-reflective coating.