MB&F has reintroduced its Legacy Machine 1 in a new form, the LM1 EVO, pairing the original 2011 movement architecture with the brand’s more rugged EVO case. The result is a 42mm titanium or 18k rose gold watch measuring 16.8mm thick and 52mm lug-to-lug, built around the same suspended 14mm balance wheel and dual independent time displays that defined the original LM1, now housed in a case engineered for actual daily wear rather than careful handling.
The original Legacy Machine 1 launched in 2011 as Max Büsser’s tribute to 19th-century watchmaking, built around Roman numerals, lacquered registers, and a dramatic flying balance wheel suspended beneath an arched bridge. It ran for six years before retiring in 2017, with its final edition housed in a 44mm steel case. The LM1 EVO brings that movement back inside a smaller, tougher shell, following the same EVO treatment MB&F previously applied to the LM Perpetual, the Split Escapement, the Sequential, the 101, and the Sequential Flyback.
Case Design and Construction
The EVO case concept was built to withstand shocks, knocks, and water exposure in ways the original dress-oriented Legacy Machine cases were never meant to handle. On the LM1 EVO that means a grade 5 titanium or 18k rose gold case fitted with two screw-down crowns, a patented FlexRing shock-absorption system, and an 80-metre water resistance rating. At 42mm wide and 16.8mm thick, the case is notably more compact than the 44mm original, with the thickness driven largely by the tall dial architecture and a hyper-domed sapphire crystal over the dial, paired with a box sapphire crystal on the back.
The bezel-less case design lets the steep curve of the front crystal flow directly into the case rather than sitting inside a raised ring, a detail that also lets more ambient light reach the movement plate below. MB&F achieves this using a thermal bonding process that fuses the glass directly into the metal, which the brand states adds structural strength over a conventionally set crystal. Both crystals carry anti-reflective coating on both sides.
Perhaps the most practical change for everyday wear is the quick-release strap system built into the case and clasp, marking the first time LM1 straps have been interchangeable. The titanium model ships on a black rubber strap, while the rose gold edition pairs with a grey rubber strap. It’s a small mechanical addition, but one that reframes a watch previously built for careful dress wear as something a owner can reconfigure for different days and conditions.
Movement Architecture and Finishing
Inside, the manual-winding calibre remains the work originally developed with Jean-François Mojon, still carrying the suspended 14mm balance wheel that anchors the visual identity of every Legacy Machine. The balance operates at a deliberately slow 2.5Hz (18,000vph), a speed MB&F has always used to make the regulating system’s motion easier to watch. For the EVO version, that balance now incorporates a Straumann double hairspring, aimed at improving accuracy and isochronism, and it sits under a newly redesigned titanium bridge rather than the original mounting.
Power reserve has grown from 45 hours on the original LM1 to 60 hours on the EVO, and the indicator itself has been redesigned to match. Where the original LM1 used a more elaborate three-dimensional motion for its power reserve hand, the EVO version displays it as an inclined semi-circular arc at 6 o’clock, a flatter and visually simpler gauge than the one it replaces. The dual time zone layout carries over unchanged in principle: two independent 12-hour dials, each with its own crown for setting, allowing a wearer to track two time zones down to the minute.
Finishing follows the 19th-century-style techniques specified by Kari Voutilainen, including gold chatons with polished countersinks, Geneva waves, polished bevels with internal angles, and handmade engraving, now set against darker NAC-treated bridges rather than the brighter tones of the earlier execution. The movement is visible through the sapphire caseback, and the signatures on it have been simplified to list only Mojon and Voutilainen by surname.
Two Configurations
MB&F is offering the LM1 EVO in two versions. The titanium model pairs a rhodium-plated dial plate with black snailed sub-dials and blue arrow-tipped hands treated with luminescence, worn on a black rubber strap. The rose gold version, limited to 33 pieces, uses a green dial plate with the same black sub-dials and gold-toned hands carrying luminescent inlays, fitted to a matching grey rubber strap.
For a watch whose underlying movement has carried MB&F’s Legacy Machine identity for over a decade, the EVO case treatment doesn’t rewrite that architecture so much as armor it. The compact 42mm proportions, the quick-release strap hardware, and the 80-metre water resistance move the LM1 out of the display case and onto the wrist as a watch meant to survive ordinary days, not just admiring glances.
