MB&F Caliber LM Sequential EVO Watch Movement

Manufacturer	MB&F
Caliber Number	Sequential EVO
Type	Manual wind
Jewels	59
Number of Parts	585
Power Reserve	72 hours
Vibrations Per Hour	21,600 bph (3Hz)
Functions	Hours and minutes at 6:00; left chronograph with seconds subdial at 9:00 and 30 minutes counter at 11:00; right chronograph with seconds at 3:00 and 30 minutes counter at 1:00; Twinverter pusher at 9:00; power reserve indicator on the back of the movement.
Features	Fully integrated dual chronograph system with “Twinverter” switch for multiple timing modes; double mainspring; flying balance wheel with regulating screws at 12 o’clock; Breguet overcoil.
Finishing	Superlative hand finishing; internal bevel angles highlighting handcraft; polished bevels; Geneva waves; hand-made engravings, darkened bridges (NAC finish).
Country of Manufacture	Switzerland
Known Models	Legacy Machine Sequential EVO (see below)

The MB&F LM Sequential EVO is an in-house dual column-wheel chronograph movement that was launched in 2022 in the Legacy Machine Sequential EVO timepiece. It is the brand’s first ever chronograph. The announcement of this movement marks MB&F’s 20th caliber in 17 years.

From the official press-release:

“With long-time Friend Stephen McDonnell, MB&F reinvents the chronograph with an innovative dual chronograph system offering multiple timing modes. The key to this ground-breaking solution is the “Twinverter”, a pusher allowing to act on both chronographs simultaneously.”

Some of the topics covered in this caliber listing:

Twinverter:

In MB&F’s own words:

“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.”

What does it do?

Via a pusher located at 9:00 on the case, the Twinverter is essentially a switch that inverts the current start/stop status of both chronographs.

Caliber Number:

As seen with the innovative designs in their timepieces, it’s clear that MB&F doesn’t color within the lines, they are independent in every sense of the word. This even carries over into the way they designate their calibers. Unlike most brands that use a numbering system, MB&F calls this caliber by the same name of the watch itself.

This movement is in the Legacy Machine Sequential EVO watches, therefore it is considered to be MB&F caliber LM Sequential EVO.

Partnership Project:

The LM Sequential EVO is a project with Northern Irish watchmaker Stephen McDonnell.

“Conceived with Stephen McDonnell, who previously reinvented for MB&F the perpetual calendar complication with the award-winning LM Perpetual.”

And from the Legacy Machine Perpetual launch:

“McDonnell had been a long-time Friend of the brand and played an instrumental role in the realisation of MB&F’s very first timepiece, Horological Machine No.1. As Büsser was thinking of developing a perpetual calendar for the fourth watch in the Legacy Machine collection, McDonnell replied that he had an idea for a perpetual calendar that addresses many of the drawbacks associated with conventional examples.Three years and a great many sleepless nights later, Legacy Machine Perpetual was born.”

Macro Gallery:

Mbf Caliber Lm Sequential Evo Chronograph Power Reserve

Mbf Caliber Lm Sequential Evo Chronograph Stephen Mcdonnell

Mbf Caliber Lm Sequential Evo Chronograph Dial

Mbf Caliber Lm Sequential Evo Chronograph Swiss Made

Mbf Caliber Lm Sequential Evo Chronograph Balance Wheel

Mbf Caliber Lm Sequential Evo Chronograph Dial Orange

Video:

Watches with this movement:

At the time of initial launch (and at the time of this post), the @mbandf caliber Legacy Machine Sequential EVO dual chrono movement is available in two models:

Legacy Machine Sequential EVO Orange (ref: 09.ZR.OR) – Zirconium with orange CVD dial
Legacy Machine Sequential EVO Black (ref: 09.ZR.BL) – Zirconium with black PVD dial