This limited edition, with its patented manufacture complication designed by Montblanc engineers in Villeret, is one of the most readable and easy-to-use perpetual calendars ever created.
The timepiece indicates the hours, minutes, day, date, month, moonphase, and leap year in a very legible way thanks to its large counters at 3, 6, and 9. But while it may be simple on the outside, there is incredible complexity beneath the surface. The perpetual calendar complication alone required three years to develop and makes up 259 of the 378 parts of the calibre MB 29.22. Unlike most perpetual calendars, which make use of levers, the MB 29.22 is composed solely of multiple wheels and cams. The date can be adjusted easily, via the crown in both directions, and the highly precise astronomical moonphase complication only needs to be adjusted by one day every 122 years.