Parmigiani Fleurier Watch Tonda PF Hijri Perpetual Calender

Parmigiani Fleurier Watch Tonda PF Hijri Perpetual Calender PFH983-1020001-100182. The TONDA PF Hijri Perpetual Calendar is a horological expression of the Tabular Islamic calendar developed by Muslim scholars and astronomers in the 8th century. This system made it possible for historians to convert Islamic dates to Gregorian dates, which in turn has made the Hijri Perpetual Calendar possible.