MB&F · Legacy Machine Sequential EVO
The movement in detail
The movement’s idea
Most chronographs measure a single interval. The MB&F LM Sequential EVO has two independent timing systems, each with separate seconds and minutes displays and dedicated start and reset pushers. The left counters occupy 9 and 11 o’clock, the right ones 3 and 1 o’clock. These are not decorative scales: they are two column-wheel mechanical chronographs in one movement.
Stephen McDonnell’s central invention is Twinverter. One additional pusher reverses both chronographs’ running states: the running one stops and the stopped one starts. If both are running, both stop; if neither is running, both start. This allows alternating activities to be timed without attempting to press two separate buttons simultaneously.
Consider a chess game. Start timing the first player, then transfer the turn with each Twinverter press. You could also track alternating training intervals while retaining separate totals. Start both chronographs simultaneously to compare two events. It is a distinct, flexible alternative to a traditional split-seconds chronograph.
Practical meaning
Behind the symmetrical display sits an integrated hand-wound movement with 585 components, 59 jewels and twin mainspring barrels. Its reserve is 72 hours. The elevated balance at 12 o’clock makes the regulator part of the visual design. Rather than combining separate modular functions, the dual chronograph systems were conceived together for these operating modes.
The original version uses a zirconium case measuring 44 mm across and 18.2 mm high. FlexRing shock protection, a screw-down crown and 80-metre water resistance add practical resilience. Still, 18.2 mm makes for a tall watch, and five functional pushers require some familiarity. This is for someone fascinated by the logic of mechanics, not merely their appearance.
