MB&F LM Sequential Flyback EVO: Twin Chronographs for Daily Life

Key Highlights

• LM Sequential Flyback EVO in grade 5 titanium with aquamarine dial plate and tilted time display.
• Dual flyback chronograph calibre with Twinverter switch enabling multiple timing modes.
• EVO treatment with 80m water resistance, screw-down crown, FlexRing shock absorber and integrated rubber strap.
• Internally jewelled vertical clutches and jewelled rollers for efficient, precise chronograph operation.
• Calibre conceived and developed by Stephen McDonnell, creator of the LM Perpetual.

The LM Sequential Flyback EVO brings one of MB&F’s most advanced chronograph concepts into the brand’s most wearable architecture. In a 44mm grade 5 titanium case with aquamarine dial plate, it combines the Sequential calibre with the EVO collection’s focus on resilience and comfort.

First launched in 2022, the LM Sequential EVO reimagined the mechanical chronograph and earned the GPHG “Aiguille d’Or”. The latest Flyback EVO edition adds flyback systems to both chronographs and a tilted time dial at 6 o’clock, improving legibility in everyday use.

The Sequential Flyback Calibre

At the heart of the LM Sequential Flyback EVO is a fully integrated dual chronograph flyback movement developed for MB&F by Northern Irish watchmaker Stephen McDonnell. Two independent chronograph trains, each with its own seconds and minutes counters, share a common escapement and a central flying balance wheel with Breguet overcoil, while double mainsprings deliver a 72-hour power reserve from 621 components and 63 jewels.

Internally jewelled vertical clutches and a dedicated control system reduce energy losses normally associated with running chronographs, even when both are engaged. The flyback function relies on carefully minimised friction and jewelled rollers, one of five patented elements within the design, with McDonnell crafting the first jewel roller prototype himself before industrialisation.

Twinverter: A Mechanical Logic Gate

The LM Sequential Flyback EVO retains the original Sequential EVO pusher layout: start/stop and reset/flyback pushers flanking each chronograph on both sides of the case. The fifth pusher, the Twinverter at 9 o’clock, acts as a binary switch that inverts the running state of both chronographs simultaneously, turning them into a mechanical logic system.

This enables independent, simultaneous, cumulative, sequential (lap-timer) and flyback-based timing modes. In practice, owners can track two dishes cooking, follow an overall gym session alongside individual stations, time two competitors in a race beyond split-second limits, or monitor complex flight legs while maintaining total elapsed time, with flyback compressing stop, reset and restart into a single press.

EVO for Modern Wear

The EVO treatment reshapes selected Legacy Machines for more dynamic lifestyles. On the LM Sequential Flyback EVO this brings 80 metres of water resistance, a screw-down crown, and an integrated rubber strap with titanium folding buckle, while MB&F’s FlexRing annular dampener between case and movement absorbs shocks along vertical and lateral axes.

The absence of a conventional bezel and the domed sapphire crystal open the view onto the aquamarine dial plate, tilted time sub-dial and Super-LumiNova-treated indications. Darkened NAC-finished bridges, internal bevels and hand engraving underline a contemporary character rooted in haute horlogerie craft.

Why it matters

The LM Sequential Flyback EVO resolves long-standing limitations of mechanical chronographs through a new architecture conceived for genuine utility rather than spectacle alone. By combining twin flyback chronographs, the Twinverter logic system and EVO-grade robustness, MB&F and Stephen McDonnell deliver a chronograph suited to real timing tasks in daily life as well as more demanding environments.

For discerning enthusiasts in the region who prioritise mechanical innovation with clear purpose, the LM Sequential Flyback EVO stands out as a coherent evolution of the complication and a compelling addition to the broader Legacy Machine story.