Perpetual Calendar Movement: sovereign mastery of time

Following on from models such as the tourbillon, the tourbillon relatif and the chronograph, Piaget is pursuing its quest for horological complications by presenting the new Manufacture Calibre 855P with perpetual calendar. Mechanically programmed to cope with the irregularities of our Gregorian calendar up until the year 2100, the perpetual calendar is one of the major complications of the watchmaking art, as well as one of the most widely used. Measuring 5.6 mm thick, the Manufacture Piaget Calibre 855P self-winding movement was designed, developed and produced entirely in-house. It displays the hours, minutes, small seconds at 4 o’clock, month and leap years at 12 o’clock, along with retrograde day of the week and date displays at 9 and 3 o’clock respectively. In addition to the latter retrograde indications, this Calibre 855P stands out from most ordinary perpetual calendars by the addition of a double-hand dual time-zone display appearing in a sub-dial at 8 o’clock. The self-winding Piaget Calibre 855P beats at a cadence of 21,600 vibrations per hour and is endowed with an approximately 72-hour power reserve.