MB&F LM Sequential EVO: Re-inventing the Chrono

In the world of high-end horology, we often see incremental improvements—a slightly thinner movement here, a new dial color there. But every few years, a piece arrives that fundamentally alters our understanding of a complication. Today, August 15, 2022, we are still reeling from the impact of the MB&F Sequential EVO. This isn't just a new model in the Legacy Machine collection; it is a total reimagining of the chronograph, arguably the most practical yet mechanically stagnant complication in watchmaking history. By partnering once again with the visionary Northern Irish watchmaker Stephen McDonnell, Max Büsser has delivered a "grail" that functions unlike anything else on the market.

The Genesis of a New Icon

To understand the MB&F Sequential EVO, one must first look at the track record of the Büsser-McDonnell duo. Their previous collaboration gave us the LM Perpetual, which solved the inherent mechanical fragility of the perpetual calendar. With the Sequential EVO, they have tackled the chronograph. While traditional chronographs are designed to measure a single duration (or perhaps two with a split-seconds/rattrapante), the MB&F Sequential EVO features two entirely independent chronograph mechanisms driven by a single escapement.

This architecture allows for a level of versatility that makes your standard "desk diver" or racing chrono look positively primitive. The watch features five pushers: two on the right for the first chronograph, two on the left for the second, and a fifth "Twinverter" pusher at the 9 o’clock position. It is this fifth pusher that acts as the secret sauce, allowing the wearer to toggle the state of both chronographs simultaneously.

Breaking Down the Twinverter

The magic of the MB&F Sequential EVO lies in how these two chronographs interact. Most enthusiasts are used to the tactile click of a column wheel, and here you get double the pleasure. The Twinverter is a revolutionary system that essentially flips the start/stop status of both chronographs. If both are stopped, pressing it starts both. If both are running, it stops both. If one is running and the other is stopped, it stops the running one and starts the stopped one.

This enables four distinct timing modes that were previously impossible or incredibly cumbersome on a mechanical watch:

1. Independent Mode: Use the two chronographs to time two completely different events with different start and stop times.
2. Simultaneous Mode: Time two events that start at the same time but end at different times (like two runners in a race).
3. Cumulative Mode: Measure the individual durations of two separate events that may overlap.
4. Sequential Mode (Lap Timer): This is the game-changer for racing fans. At the end of a lap, hitting the Twinverter stops the first chronograph (allowing you to read the time) and instantly starts the second one. When the next lap ends, hit it again to switch back. It’s a mechanical lap timer that actually works in real-time.

Technical Specifications

For those who crave the data, the MB&F Sequential EVO is as impressive on paper as it is on the wrist. Built within the "EVO" architecture, it is designed for more than just display cases; it’s meant to be worn.

The EVO Philosophy: Durability Meets Art

While the movement is a work of art, the "EVO" designation means this watch is built for the rigors of life. The case is crafted from Zirconium, a silver-grey metal that is lighter than stainless steel and more durable than titanium. Unlike bronze which develops a patina, Zirconium maintains its sleek, futuristic look indefinitely.

One of the most impressive features of the EVO case is the "FlexRing." This is an annular dampener fitted between the case and the movement, providing shock protection along both vertical and lateral axes. This isn't a watch you need to baby. With 80 meters of water resistance and a screw-down crown, it’s a sports-capable machine that happens to house one of the most complex movements in existence.

In a recent wristshot session, the 44mm diameter felt surprisingly ergonomic thanks to the lugless design and the integrated rubber strap. Despite the 18.2mm height (necessary to accommodate the soaring balance wheel and double-domed sapphire), it sits securely on the wrist, making it a viable daily wearer for the bold collector.

Aesthetic Brilliance and Legibility

MB&F has released the MB&F Sequential EVO in two launch editions: one with an "atomic orange" dial plate and another in a "coal" black finish. The orange dial is particularly striking, offering a high-contrast backdrop for the four sub-dials. The layout is symmetrical and surprisingly intuitive once you spend five minutes with it.

The use of lume is also generous. The numerals and hands are coated with Super-LumiNova, ensuring that even in low-light conditions, the dual-timing displays remain perfectly legible. Looking through the sapphire crystal is like looking into a mechanical city; the suspended balance wheel—a signature of the Legacy Machine line—beats slowly at 3Hz, providing a hypnotic rhythm to the frantic dance of the chronograph hands.

The Finishing Touch

As with any MB&F creation, the movement finishing is exemplary. Even though the MB&F Sequential EVO is a more "sporty" execution, the internal beveling, polished sinks, and gold chatons are all present. Stephen McDonnell’s architecture is distinctive, with long, elegant levers and a depth that invites the use of a loupe. It’s a reminder that even in a watch designed for utility and durability, the standards of haute horlogerie are never compromised.

A New Chapter for the Chronograph

In the months since its debut, the MB&F Sequential EVO has proven that there is still room for innovation in mechanical watchmaking. It challenges the user to interact with time in a way that is both tactile and intellectual. By removing the limitations of the traditional chronograph, MB&F has created a tool that is as functional as it is beautiful.

Whether you are timing laps at the track or simply coordinating two different kitchen timers for a complex dinner, the MB&F Sequential EVO performs with a mechanical soul that digital devices simply cannot replicate. It is a testament to what happens when a brand refuses to be constrained by tradition while still honoring the craftsmanship of the past. For the collector who already has the divers and the GMTs, this is the next logical step into the future of horological complexity.