ISLAMIC, 'Abbasid Caliphate. temp. Al-Amin, AH 193-199 / AD 809-813. Dirham (Silver, 23 mm, 2.83 g, 1 h), citing al-Ma'mun, the brother of the caliph, as Wali 'ahd al-Muslimin ('successor of the covenant of the Muslims' in Kufic) and as ibn Amir al-Mu'minin ('son of the Commander of the Faithful' in Kufic). Balkh, AH 193 = AD 809. SICA III, 702. Nicely toned. Light marks and the flan slightly wavy, otherwise, very fine.