ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun, AH 193-218 / AD 809-833. Dirham (Silver, 23 mm, 2.87 g, 3 h), citing Dhu'l Riyasatayn (holder of the two ministries) al-Fadl, the vizier of the caliph al-Ma'mun. Madinat Isbahan, AH 199 = AD 814/5. SICA III, 360. Slightly wavy along one edge, otherwise, good extremely fine.
From the Tabib Collection, formed over the past 40 years.