MB&F Legacy Machine Sequential Evo

MB&F presents Legacy Machine Sequential Evo, the first ever chronograph watch by the award-winning Swiss horological laboratory.

Created in collaboration with Stephen McDonnell, it is the 20th caliber from the MB&F. The LM Sequential EVO movement incorporates two column-wheel chronographs and a groundbreaking “Twinverter” binary switch, allowing multiple timing modes including split-second and lap timer modes – a combination never seen before in any chronograph.

Available in atomic orange or coal black, 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, 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.

There is also a fifth pusher, located at the 9 o’clock position. Known as “Twinverter”, it controls both chronograph systems, operating as a binary switch that inverts the current start/stop status of each chronograph.

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.

Thanks to its twin chronograph mechanisms, LM Sequential EVO can also perform the same functions as a split-seconds chronograph. It even outperforms conventional chronographs and split-seconds chronographs in terms of energy efficiency and precision. Incorporating several innovative features, the manual wound movement offers 72 hours (3 days) power reserve.

The MB&F LM Sequential EVO Chronograph also offers the following modes of operations:

  • Independent mode: To measure the duration of multiple events with separate starting points and end points, even when the events overlap in timing
  • Simultaneous mode: To measure the individual durations of two events that start simultaneously, but have different end points
  • Cumulative mode: To measure the individual cumulative durations of two discontinuous events
  • Sequential mode (or lap mode): To measure the individual sub-durations of a single continuous multi-phase event, with provision for sub-durations that last over a minute

Designed for everyday use, its zirconium EVO case offers 80 metres of water resistance. The internal “FlexRing” damping system protects the complex chronographs movement from shocks.

Legacy Machine Sequential EVO is presently available in two zirconium editions: with atomic orange dial plate (orange CVD) and with coal black dial plate (black PVD).

Technical details

Fully integrated dual chronograph system developed for MB&F by Stephen McDonnell, featuring Twinverter switch allowing multiple timing modes
Manual winding with double mainspring
72 hours (3 days) power reserve
Flying balance wheel with regulating screws at 12 o’clock, Breguet overcoil
Superlative hand finishing; internal bevel angles highlighting handcraft; polished bevels
Geneva waves; hand-made engravings, darkened bridges (NAC finish)
Galvanic black dials with Super-LumiNova on numerals and hands
Balance frequency: 3Hz (21,600 vph)
Number of components: 585
Number of jewels: 59

Time display (hours/minutes) at 6 o’clock
Left chronograph: seconds displayed at 9 o’clock and minutes at 11 o’clock; start/stop pusher at 10 o’clock and reset at 8 o’clock
Right chronograph: seconds displayed at 3 o’clock and minutes at 1 o’clock; start/stop pusher at 2 o’clock and reset at 4 o’clock
Twinverter pusher at 9 o’clock: binary switch that inverts the current start/stop status of both chronographs
Power reserve indication at the back of the movement

Material: zirconium
Dimensions: diameter 44mm x height 18.2mm
Number of components: 74
Water resistance: 80m / 8ATM / 270 feet
Screw down crown
FlexRing annular dampener fitted between case and movement, providing shock protection along the vertical and lateral axes
Sapphire crystals on top and display back treated with anti-reflective coating on both faces

Integrated rubber strap with titanium folding buckle