Drachm - al-Fadl b. Sahl Arab-Khwarezm

Al-Fadl ibn Sahl served as the all-powerful vizier to Caliph al-Ma'mun during the civil war against al-Amin, and his authority over the eastern provinces — including Khwarezm — was extraordinary enough that coinage could be struck acknowledging his name directly. He had converted from Zoroastrianism to Islam, a fact al-Ma'mun publicly leveraged for political credibility in the east. The Arab-Khwarezm series occupies an awkward transitional zone between Sasanian-derived regional types and full Abbasid reform coinage, and pieces naming provincial governors of this rank are genuinely uncommon survivors of a short administrative window. Ibn Sahl was assassinated in his bath in 818.