Upon first sight, the limited-edition Legacy Machine Perpetual is a visual treat. The masterpiece is the result of a collaboration between MB&F and Irish watch maker Stephen McDonnell. The collection, in which this 44mm timepiece now joins as its fourth edition, was the result of owner Maximilian Büsser's creative imagination in 2001.

Why would this timepiece be of significance? Unlike traditional perpetual calendars, the LM Perpetual uses a 28-day month and then adds the extra days as required. By forgoing the use of the grand levier system, the new and improved timepiece ensures that the dates do not skip nor do they jam as they change. It even has a quickset pusher that is there specifically to adjust the year. 

Resting on hidden studs, the sub-dials appear to float within the case, all thanks to the mechanical processor that replaces the grand levier. In a clockwise order, the hours and minutes are nestled in at 12 o'clock while the day of the week is indicated at 3 o'clock. Directly below it at 4 o'clock is the power reserve indicator while the dial featuring the month sits close by. Coming full circle is the retrograde leap year indicator while the date is showcased at 9 o'clock.

With only 25 pieces available in either 18 carat red gold or platinum, the dials and 72-hour power reserve are protected between sapphire crystal glasses. Choose between a black or dark brown hand-stitched alligator strap and the timepiece is ready to be worn.

Only 25 pieces of the Legacy Machine Perpetual by MB&F are available in each 18 carat red gold and platinum.