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The Legacy Machine Perpetual, the award-winning and convention-breaking perpetual calendar conceived for MB&F by Stephen McDonnell, gains a new level of liberation with the LM Perpetual EVO.

A new 44mm case in lightweight and durable zirconium, redesigned to emphasise openness and extreme clarity – thanks also to a generous dose of Super-LumiNova on the time and calendar indications. A specially developed monobloc shock-absorbing ‘FlexRing’ system that makes for the most robust Machine ever to emerge from MB&F. A new “atomic orange” CVD dial plate colour – that is as bright as it is difficult to achieve. A closely-fitted integrated rubber strap for the smoothest wearing experience of any MB&F Machine to date, and water resistance of 80m thanks to its screw-down crown. In design, in technique, in spirit, this new Machine is an evolution of your story with MB&F. The LM Perpetual EVO is not a watch for sports, it is a watch for life.

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the machine


  • Material: zirconium
  • Dimensions: 44 mm x 17.15 mm
  • Water resistance: 8 ATM / 80m / 270 feet


  • Fully integrated perpetual calendar developed for MB&F by Stephen McDonnell, featuring dial-side complication and mechanical processor system architecture with inbuilt safety mechanism.
  • Manual winding with double mainspring barrels.
  • Bespoke 14mm balance wheel visible on top of the movement.
  • Superlative hand finishing throughout.
  • Power reserve: 72 hours
  • 581 components / 41 jewels

Functions / indications

  • Hours, minutes, day, date, month, retrograde leap year and power reserve indicators
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Mechanical processor

Mechanical processor

The revolutionary mechanical processor uses a default 28-day month and adds extra days as required. There is no "skipping over" redundant days, so the result is a fool-proof system that also auto-protects itself from incorrect manipulation.

Perpetual calendar

Perpetual calendar

Hours, minutes, day, date, month, and leap year can be set independently by manually pressing the redesigned, ergonomic correctors. No need for special tools or complicated date setting!



The FlexRing is an annular dampener fitted between case and movement, providing shock protection along both vertical and lateral axes. Machined from a single block of stainless steel, the dampener imparts exceptional robustness to the perpetual calendar.



Over the past 15 years, MB&F creations have transported their wearers to destinations that exist only on maps of the imagination: from star-cruisers to deep-sea jellyfish, Maximilian Büsser’s Machines are the mechanical cartographers of the multiverse.

But the greatest journey has yet to be undertaken, and true progress is marked by evolution. With the LM Perpetual EVO, you become the navigator; the map is your life. On this journey, you’ll never have to leave your watch behind.

The MB&F collection has welcomed several complications and horologically prestigious mechanisms over the past 15 years, including the record-smashing TriAx that debuted in 2019’s Legacy Machine Thunderdome. In terms of combining prestige, tradition and innovation, however, the LM Perpetual has remained at the apex of MB&F watchmaking savoir-faire since it was introduced in 2015.