106494Ref

Debuting in 2011, the Tourbillon Bi-Cylindrique utilizes the hand-wound MB M65.63 caliber within a large case featuring a 6 o'clock protrusion for its 'mysterious' time display. It marks the first instance of a wristwatch incorporating double cylindrical balance springs, a design inspired by 18th-century marine chronometers. By oscillating in opposition and sharing torque, these springs enhance isochronism and movement accuracy. Limited to 8 pieces.