Early this week MB&F debuted a new Legacy Machine with a fully integrated perpetual calendar. Developed for MB&F by Irish watchmaker, Stephen McDonnell, the movement features a 14 mm dial-side balance wheel, like the other Legacy Machines, which offers a perfect central view as it oscillates to-and-fro. Unique to this LM model is a perpetual calendar that does a few things different than a traditional perpetual.

According to MB&F, “The default month has gone from 31 days to 28, and the central “grand levier” has been replaced by an innovative, patent-pending “mechanical processor” – solving a very frustrating issue with conventional calendars: they break easily due to faulty manipulations. This new Legacy Machine is fool-proof! Just as important, we’ve traded the standard “sandwich” construction – base movement + calendar module + display – for a spectacular, fully integrated architecture, offering an unprecedented view into the 581-component mechanism.”

The MB&F Legacy Machine Perpetual runs at 2.5Hz (18,00 vph), is manually wound, and features double mainsprings good for a 72-hour power reserve. Finishing includes bevelled and polished component edges, Geneva waves, and hand engravings. Production is limited to 25 red gold and 25 platinum editions.

Posted by:Jason Pitsch

Jason Pitsch is the Founder of Professional Watches. He appreciates good craftsmanship in everything from architecture to automobiles to cameras to clothing. Yet his focus for the past decade has remained consistent on covering just one type: watchmaking.