100 Rials - Mohammad Rezā Pahlavī

Pick 57 sits in one of the more politically compressed windows in Iranian banking history. The series was issued across the period that saw Mossadegh's nationalization of the Anglo-Iranian Oil Company, the ensuing economic embargo, and ultimately the August 1953 coup that restored the Shah's full authority. Notes printed during this stretch circulated through an economy under significant external pressure, with foreign exchange reserves depleted and British-led sanctions cutting off oil revenues almost entirely.

The dual-printer credit — De La Rue and Harrison & Sons — reflects a division of labor common to high-security note production of the period, with one firm typically handling the intaglio work and the other the letterpress or finishing runs.