Just by looking at the watch one can see that the Legacy Machine Perpetual Calendar represents a horological firework.

Introduced in 2015, the Legacy Machine Perpetual Calendar offers significant improvements to eliminate the fragile drawbacks and gear jams tied to the conventional perpetual calendar mechanism. With a movement devised by Stephen McDonnell (an Irish independent watchmaker), an open-worked dial designed by Eric Giroud, and a spectacular movement finished by none other than Kari Voutilainen, this is one of the most extraordinary avant-garde timepieces of the past years.

Awarded the Best Calendar Watch in GPHG 2016, the three-dimensional architecture of the model exhibits a revolutionary in-house mechanism featuring 581 components. The mechanical processor uses an unusual 28-day architecture —as opposed to the traditional use of 31 days—and adds extra days as required without “skipping over” redundant days. This results in a fool-proof system that auto protects itself from incorrect manipulation.

The amazing movement, is not only impressively complex but beautifully hand finished, the dial side showing the wide array of gears, clicks, pinions and bridges with a 14mm flying balance wheel suspended above. The back side is also beautifully hand finished with perfectly aligned Geneva waves with interior and exterior polished angles.

Other than the calendar functions, a power reserve display and a leap year indication are playfully presented on retrograde scales.

The white gold Legacy Machine Perpetual Calendar has now been discontinued and even though not a limited edition piece per se only 66 were ever made with the grey plate like the present example.

The present watch was serviced by MB&F in September 2022 and comes with a one year warranty.