MB&F celebrates the pioneering works of past masters and complications with Legacy Machine No.2.

Suspended high above the dial, the double “flying” balances are in fact the most visible parts of two fully independent regulating systems, each beating at its own rate. The planetary differential sits proud of the surface, supported by a stunning double-arc mirror-polished bridge. The complex differential is the key element in the double regulator system: the rates are averaged out by the mechanism, which drives the blued hour and minute hands of the white stretched-lacquer sub dial. To make things just a bit more complicated, the two flying balances and their escapements are identical mirror images, right down to the position of the stud holders pinning their balance springs.

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the machine


  • Materials: 18k red gold, 18k white gold, platinum 950, grade 5 titanium or palladium.
  • Dimensions: platinum, red and white gold editions: 44mm x 20mm; redesigned edition in titanium and palladium: 44mm x 19mm
  • Water resistance: 30 m / 90' / 3 atm


  • Three-dimensional horological movement developed exclusively for MB&F by Jean-François Mojon at Chronode and Kari Voutilainen
  • Manual winding with single mainspring barrel
  • Planetary differential comprising 3 gears and 5 pinions
  • Two bespoke 11mm balance wheels with four traditional regulating screws floating above the movement and dials
  • 241 components / 44 jewels / 45-hour power reserve
  • Superlative hand finishing throughout respecting 19th century style

Functions / indications

  • Hours and minutes
  • Planetary differential transmits the average rate of the two regulators to the single gear train.
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Flying balance wheels

Flying balance wheels

Icon of the Legacy Machines, the LM2 has not just one but two bespoke 11mm balance wheels flying above the movement and dials.

Planetary differential

Planetary differential

The advantage of using a planetary differential is that the two balances beat at their natural rate, with the differential supplying the average of the two completely independent frequencies. This provides a rate with fewer variations.

Fine Finishing

Fine Finishing

Superlative hand finishing throughout, respecting 19th century style: polished internal bevel angles highlighting handcraft, Geneva waves and hand-made engravings.



Legacy Machines celebrate complications from past masters, and complications don’t come much more intriguing than connecting two regulators with a differential to drive one time indication. Nor do past masters come more “masterful” than Abraham-Louis Breguet (1747-1823), Ferdinand Berthoud (1727-1807) and Antide Janvier (1751-1835), three men united by their inventive genius and their experimentations with dual regulators.

Two and a half centuries after three of the world’s greatest watchmakers put two balance wheels into their movements, MB&F celebrates their pioneering works with Legacy Machine No.2 and its double “flying” balances.


Launch editions in 18k red gold, 18k white gold, and platinum 950 (limited to 18 pieces); redesigned edition in grade 5 titanium (limited to 18 pieces), 18k white gold edition with purple dial (limited to 12 pieces); 18k red gold with blue dial (limited to 12 pieces), and Palladium (limited to 18 pieces).