BR-X2 tourbillon micro rotor BRX2-MRTB-ST

The concept of the BR‑X2 is to wear the movement directly on the wrist. The extra-thin, square-shaped BR-CAL.380 manufacture caliber is freely displayed, encased between two sapphire plates connected on the sides by a narrow steel belt machined from a single piece.

Source: Bell & Ross website, last updated Mar 2026