ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun, AH 193-218 / AD 809-833. Dirham (Silver, 24 mm, 2.95 g, 3 h), citing Dhu'l Riyasatayn (holder of the two ministries) al-Fadl, the vizier of the caliph al-Ma'mun, Madinat al-Salam, AH 198 = AD 813/4. SICA III, 1734. Sharply struck and nicely toned. Good extremely fine.