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Legacy Machine Sequential Flyback Platinum

BHD 81,900.000
by MB&F
Description

The LM Sequential Flyback Platinum is not about adding complications — it’s about rethinking them. Developed for MB&F by Stephen McDonnell, the fully integrated movement features two independent chronograph systems, each with its own seconds and minutes counters, controlled by dedicated pushers on either side of the case.

At the heart of the system is the Twinverter, a mechanical switch that simultaneously reverses the running state of both chronographs. This allows for multiple timing modes — independent, synchronized, split-use, or sequential — all without electronic logic or software. A flyback function on each chronograph enables instant reset and restart while running.

Housed in a 44 mm platinum case and paired with a sky-blue dial plate, the movement is crowned by a flying balance wheel with Breguet overcoil at 12 o’clock. Finished with hand-polished bevels, Geneva waves, NAC-treated bridges, and hand-made engravings, the LM Sequential Flyback is mechanical logic turned into visual drama.

Price shown is excluding VAT

While we strive to present product photos with the utmost accuracy, variations in lighting and device settings may result in slight differences in colour compared to the actual product.

Features

The Legacy Machine Sequential Flyback Platinum is MB&F’s ultimate chronograph experiment — two fully independent flyback chronographs housed within a single movement, linked by a mechanical brain called the Twinverter. Complex, intuitive, and visually theatrical, it redefines how multiple time intervals can be measured simultaneously.

Specifications

Technical Specifications

Model
Legacy Machine Sequential Flyback

Reference
10.PL.BU

Case
Platinum
Diameter: 44 mm
Height: 18.2 mm
Water resistance: 3 ATM / 30 metres
Sapphire crystal front and display back with anti-reflective coating
Case construction comprising 88 components

Movement
Fully integrated dual flyback chronograph developed by Stephen McDonnell
Twinverter switch enabling multiple chronograph timing modes
Manual winding with twin mainspring barrels
Flying balance wheel with Breguet overcoil and regulating screws at 12 o’clock
Hand-polished bevels, Geneva waves, darkened NAC-finish bridges, and hand-made engravings

Power Reserve
Approximately 72 hours

Frequency
3 Hz (21,600 vph)

Functions
Hours and minutes displayed at 6 o’clock

Left chronograph
Seconds at 9 o’clock
Minutes at 11 o’clock
Start/stop pusher at 10 o’clock
Reset/flyback pusher at 8 o’clock

Right chronograph
Seconds at 3 o’clock
Minutes at 1 o’clock
Start/stop pusher at 2 o’clock
Reset/flyback pusher at 4 o’clock

Twinverter
Located at 9 o’clock
Simultaneously reverses the running state of both chronographs

Power reserve indicator
Displayed on the movement’s back

Components
619 components
63 jewels

Dial
Sky-blue dial plate

Strap & Buckle
Alligator leather strap
White gold folding buckle