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IN VIDEO: McDonnell explains perpetual MB&F design


MB&F has released its first high complication watch in the form of the Legacy Machine Perpetual, a groundbreaking addition to its more traditional Legacy Machine collection.

The movement has been designed from the ground up by Northern Irish watchmaker Stephen McDonnell, Bremont’s current in-house technical genius, in founder Maximilian Busser’s approach of calling in the services of experts in their field, the constituent Friends in Maximilian Busser & Friends or MB&F.


Not content with the existing constraints and weaknesses of the standard approach to perpetual calendar design, McDonnell has designed the movement to accept adjustment at any point by removing the fragile central ‘grand levier’ and instead developing a patent-pending ‘mechanical processor’. The movement’s default month has also been set to 28 days instead of 31 days and demonstrates instant change to the 1st following short months.

McDonnell’s approach is also a fully integrated design offering an astonishing depth to the 581-component movement which is showcaseded by using an open dial design.

McDonnell’s association with MB&F is not a new one, he was one of a band of watchmakers who saved MB&F in its infancy by creating the HM1 movement.

The MB&F Legacy Machine Perpetual will be created with 25 pieces in Red Gold and 25 pieces in platinum.

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Editor of WatchPro, the WatchPro Hot 100 and The Luxury Report.


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