MB&F creations have long transported their wearers to destinations that exist only on maps of the imagination, with Maximilian Büsser’s Machines acting as the mechanical cartographers of the multiverse.
The LM (Legacy Machine) Perpetual EVO was initially launched in three limited editions in zirconium, followed by a titanium edition with green CVD dial-plate. In 2024, MB&F introduces a new icy blue dial-plate in the same highly resistant titanium case, replacing its green predecessor. All editions feature a closely-fitted, integrated rubber strap for the smoothest wearing experience of any MB&F Machine ever.
The watch features a 44mm case in zirconium or titanium, modern metals with material properties surpassing stainless steel, a case profile that emphasises openness and extreme clarity and a specially developed monobloc shock-absorbing system – FlexRing – that makes for the most robust machine ever to emerge from MB&F. The LM Perpetual Engine, designed by Stephen McDonnell, operates an award-winning perpetual calendar that replaces traditional constructions with an innovative mechanical processor.
Although the 44mm diameter is unchanged from its 2015 iteration, the new EVO case design features a no-bezel construction, with the domed sapphire crystal fused directly to the case. The expansive new presentation of the LM Perpetual Engine was no simple design reconfiguration. New geometries for the sapphire crystal had to be calculated, achieving the mechanically opposing aims of maintaining structural strength and decreasing its height-to-diameter ratio. Freeing LM Perpetual EVO from the bezel also necessitated the use of a sophisticated thermal bonding system between the sapphire crystal and the case.
The previously circular pushers for adjusting the perpetual calendar have been enlarged into double-sprung oblong actuators, boosting the tactile comfort and ease of adjustment. The LM Perpetual EVO is rated at 80m of water resistance, enabled by its screw-down crown.
An additional new element of the LM Perpetual EVO is the FlexRing: an annular dampener fitted between case and movement, providing shock protection along the vertical and lateral axes. Machined from a single block of stainless steel, the dampener imparts exceptional robustness to the perpetual calendar.
When Stephen McDonnell set out to redesign the perpetual calendar for MB&F, he proposed a system that rethought the entire mechanical basis of the complication. The LM Perpetual uses a ‘mechanical processor’ consisting of a series of superimposed discs. This revolutionary processor takes the default number of days in the month at 28 — because, logically, all months have at least 28 days — and then adds the extra days as required by each individual month. This ensures that each month has exactly the right number of days and removes the possibility of the date jumping incorrectly. An inbuilt safety feature disconnects the quickset pushers during the date changeover, so that even if the pushers are accidentally actuated whilst the date is changing, there is no risk of damage to the movement.
In design, in technique, in spirit, Legacy Machine Perpetual EVO is not a watch for sports. It is a watch for life.
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