MB&F unveiled its first-ever chronograph LM Sequential EVO and its 20th calibre in just 17 years. The timepiece was conceived by the watchmaker from Northern Ireland Stephen McDonnell, who also back in 2015 created the movement for Legacy Machine Perpetual.
The dial plate of LM Sequential EVO features two chronograph displays. One has its seconds display at 9 o’clock and minutes display at 11 o’clock. The other has its seconds display at 3 o’clock and minutes display at 1 o’clock. Each of these chronograph displays can be started, stopped, and reset completely independently of each other with the help of the start/stop and reset pushers on their respective sides of the case. You might mistakenly thought that the watch boasts four chronograph pushers, but, in fact, there is a fifth pusher, located at the 9 o’clock position: the “Twinverter”. This secret pusher enhances the functionality of the LM Sequential EVO beyond any existing chronograph wristwatch. It controls both chronograph systems, operating as a binary switch that inverts the current start/stop status of each chronograph. If both chronograph displays stop, pressing the Twinverter will cause both of them to start simultaneously. If they are both running, the Twinverter makes them stop. If one is running and the other is stopped, the Twinverter stops the one that is running and starts the one that is stopped.
Thanks to its twin chronograph mechanisms, LM Sequential EVO can also perform the same functions as a split-seconds chronograph. It even outperforms traditional chronographs and split-seconds chronographs in terms of energy efficiency and precision.
The switch function that comes with the Twinverter allows the watch to do things that existing chronographs can not:
- “Independent mode” – measure the duration of multiple events with separate starting points and end points, even when the events overlap in timing;
- “Simultaneous mode” – measure the individual durations of two events that start simultaneously, but have different end points;
- “Cumulative mode” – measure the individual cumulative durations of two discontinuous events;
- “Sequential mode (or lap mode)” – measure the individual sub-durations of a single continuous multi-phase event, with provision for sub-durations that last over a minute.
Legacy Machine Sequential EVO launches in two zirconium editions: with atomic orange dial plate (orange CVD) and with coal black dial plate (black PVD). Zirconium is lighter than stainless steel and more durable than titanium. Its hypoallergenic and anti-microbial attributes make it perfect for an active-lifestyle watch.
To accommodate the placement of the 3Hz (21,600vph) suspended balance in relation to the chronograph displays, the sapphire-crystal dome underwent a complicated shift in geometry. There are two subtle angles incorporated within the camber of the crystal in order to minimize the height of LM Sequential EVO when worn on the wrist.
The watch uses an annular dampener fitted between case and movement, providing shock protection along both vertical and lateral axes : the FlexRing.
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