Legacy Machine Perpetual
Overview
With Legacy Machine Perpetual, MB&F and independent watchmaker Stephen McDonnell have reinvented one of the most complex traditional watchmaking complications: the perpetual calendar.
The result is Legacy Machine Perpetual, featuring a visually stunning in-house movement, developed from the ground up to eliminate the drawbacks of conventional perpetual calendars. The 581-component, fully integrated and purpose-built movement of Legacy Machine Perpetual has been designed for user-friendly and trouble-free use: thanks to an innovative “mechanical processor”, no more skipping dates or jamming gears, and the adjuster pushers automatically deactivate when the calendar changes, so no problems there either.
What's so special about this machine?
A mechanical processor, a 3-dimensional architecture and a perpetual calendar - all that one could need.
MECHANICAL PROCESSOR
The revolutionary mechanical processor uses a default 28-day month and adds extra days as required. There is no "skipping over" redundant days, so the result is a fool-proof system that auto-protects itself from incorrect manipulation.
3-DIMENSIONAL ARCHITECTURE
The 14mm balance wheel and indication dials hover above the movement, offering a perfect view into the 581 components of the complex mechanism.
PERPETUAL CALENDAR
Hours, minutes, day, date, month, and leap year can be set independently by manually pressing the correctors. No need for special tools or complicated date setting!
Machine in action
Complexity made easy.
THE MACHINE
Beginning with a blank sheet of paper, MB&F and independent Irish watchmaker Stephen McDonnell have completely reinvented that most traditional of horological complications: the perpetual calendar.
The result is Legacy Machine Perpetual, featuring a visually stunning in-house movement – developed from the ground up to eliminate the drawbacks of conventional perpetual calendars.
20th Anniversary Limited Edition: 20 pieces in stainless steel with black sub dials
- Material: 18K red gold, 18K white gold, 18K yellow gold, platinum 950, grade 5 titanium, palladium 950 or stainless steel.
- Dimensions: 44 x 17.5 mm
- Fully integrated perpetual calendar developed for MB&F by Stephen McDonnell, featuring dial-side complication and mechanical processor system architecture with inbuilt safety mechanism.
- Manual winding with two mainspring barrels.
- Bespoke 14mm flying balance wheel visible on top of the movement.
- Superlative hand finishing throughout respecting 19th century style.
- Power reserve: 72 hours
- 581 components / 41 jewels
- Hours, minutes, day, retrograde date, month, retrograde leap year and power reserve indicator
Discover the models available for this collection
20th Anniversary LM Perpetual Longhorn
2025 marks the 20th Anniversary of an adventure that started in 2005 when Maximilian Büsser started putting together a network of “Friends”, on the basis of a drawing that we know now as Horological Machine No.1.
The LM Perpetual Longhorn contains MB&F’s GPHG award-winning perpetual calendar first released in 2015. Created in collaboration with independent watchmaker Stephen McDonnell, it relies on a ground-breaking “mechanical processor” which avoids skipping dates and jamming gears as the adjuster pushers automatically deactivate when the calendar changes.
In this anniversary edition of 20 pieces, McDonnell’s visually stunning in-house movement takes on a whole new aesthetic with the addition of long horns and the black, silver and blue colourway.
Inspiration
The perpetual calendar is one of the great traditional complications, calculating the apparently random complexity of the varying numbers of days in each month − including the 29 days in February during leap years. But traditional perpetual calendars do have a few drawbacks: dates can skip; they are relatively easy to damage if adjusted while the date is changing; and the complications are usually compromises of modules powered by base movements.
LM Perpetual features a fully integrated 581-component calibre − no module, no base movement − with a revolutionary new system for calculating the number of days in each month. And it holistically reinterprets the aesthetics of the perpetual calendar by placing the full complication on dial-free display underneath a spectacular suspended balance.
Continue to
Legacy Machine Perpetual EVO
Legacy Machine Sequential Flyback
PERPETUAL CALENDAR
Hours, minutes, day, date, month, and leap year can be set independently by manually pressing the correctors. No need for special tools or complicated date setting!