The only Bell & Ross BR-X1 chronograph tourbillon sapphire has a skeleton movement, equipped with a flying tourbillon and a single-button chronograph. Its transparent case has a diameter of 45 mm and is cut from nine sapphires. Each piece is used for the middle, back, bezel, mirror and 4 bumpers of the case.

Sapphire is the second hardest material on earth-only diamonds are harder-almost completely scratch-resistant, and the process of making it into a finished case is very difficult, requiring hours of machining and polishing https://www.twatchclone.ru.

The components of the manually-wound movement that can be seen through the transparent dial include: the column wheel driving the chronograph at 12 o’clock; the pointer power reserve indicator at 9 o’clock; the single-button rocker for Controls the start, stop and reset functions of the timer; there is also a large flying tourbillon frame, enhanced by Bell & Ross’s & symbol, occupying the 6 o’clock position.