1 Tumân - Nāṣer al-Dīn Qājār

Nāṣer al-Dīn Shāh's reign lasted nearly fifty years — the longest of any Qajar monarch — and his treasury issued tuman coins across multiple decades, but the series is riddled with die inconsistencies and unofficial restrike activity that has complicated attribution ever since. KM#917 was produced at Tehran during a period when the Iranian monetary system was under increasing pressure from Russian and British commercial interests, both empires actively maneuvering to control Persian trade concessions.

The Reuter Concession scandal of 1872 had already shaken the court's finances. By the mid-1880s, silver procurement for large-denomination coinage was itself a diplomatic matter.