Introducing Legacy Machine Sequential EVO, featuring the debut appearance of MB&F’s 20th movement, in the first chronograph wristwatch of MB&F. Indeed, it is also the first chronograph wristwatch of its kind.
Conceived by one of the very earliest MB&F collaborators and Friends, Stephen McDonnell, LM Sequential EVO explodes the current limits of what we thought chronographs could do. Just like the 2015 Legacy Machine Perpetual, the last major Stephen McDonnell movement for MB&F, LM Sequential EVO involved a back-to-the-drawing-board approach towards the brand’s most basic assumptions on chronograph construction.
The dial plate of LM Sequential EVO, available in atomic orange or coal black, 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, using the start/stop and reset pushers on their respective sides of the case. These make up the four chronograph pushers you would usually associate with having two chronograph mechanisms in one watch.
However, there is a fifth pusher, located at the 9 o’clock position: the “Twinverter”. This pusher is the secret that elevates 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. This means that if both chronograph displays happen to be stopped (at zero position or otherwise), 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.
LM Sequential EVO can therefore be used just as you would any other chronograph, but thanks to its twin chronograph mechanisms, it can also perform the same functions as a split-seconds chronograph. In fact, thanks to the novel mechanical improvements to chronograph construction as conceived and implemented by Stephen McDonnell, it even outperforms conventional chronographs and split-seconds chronographs in terms of energy efficiency and precision.
But there is much more: the switch function that comes with the Twinverter allows LM Sequential EVO to do things that no chronograph wristwatch has been able to accomplish so far. Here are a few things that the LM Sequential EVO can do, that existing chronographs cannot:
- 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 retails for SGD 249,000 with tax.