The Low-Down

MB&F’s landmark Legacy Machine Perpetual, the award-winning perpetual calendar created for MB&F by Stephen McDonnell, takes on an ebullient new lease of life forged from lightweight and industrially resilient titanium.

First introduced in 2015, the new watch remains housed in a 44mm case. But for 2021 it has been redesigned to emphasize lightness, strength, openness and extreme clarity even in the darkest of light settings with an abundance of Super-LumiNova on the time and calendar indications. There’s also the specially developed monobloc shock-absorbing ‘FlexRing’ system which makes this new Legacy Master the most robust Perpetual Calendar to date.

As for the EVO FlexRing, it’s an annular dampener fitted between case and movement, providing shock protection along the vertical and lateral axes. What’s an annular dampener? In mathematical terms it’s the region between two concentric circles, shaped like a ring or a hardware washer, hence the FlexRing. Made from stainless steel, the dampener renders extreme robustness to the delicacy of the perpetual calendar, solving one of the key problems of enjoying such a sophisticated watch in all kinds of conditions.

IMHO

Stephen McDonnel’s solution for a perpetual calendar has truly broken the mold. It not only looks visually stunning with its sub dials appearing to float in suspension, it’s also more accurate and more logical. The LM Perpetual EVO features a fully integrated 581-component calibre with no module, and one that is not compromised by the workings of a base movement. McDonnel’s perpetual calendar introduced a revolutionary new system for calculating the number of days in each month. The LM Perpetual EVO movement employs a “mechanical processor”. It counts 28 days instead of 31, seamlessly covering all days in a month with extra days added as needed with no need to skip dates or fast forward. The new lightweight and supremely resilient EVO models with the FlexRing enables the wearer to take a Perpetual Calendar watch wherever the mood takes them.

Tech Specs

Material: Titanium
Dimensions: 44 mm x 17.15 mm
Water resistance: 80m
Movement: Fully integrated perpetual calendar developed for MB&F by Stephen McDonnell, featuring dial-side complication and mechanical processor system architecture with inbuilt safety mechanism. 72 hours power reserve. 581 components / 41 jewels
Functions: Hours, Minutes, Day, Date, Month
Strap: Integrated rubber
Price: TBC