ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun, AH 199-218 / AD 813-833. Dirham (Silver, 24 mm, 3.00 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 200 = AD 815/6. SICA III, 1742. The flan slightly wavy, otherwise, good very fine.