ISLAMIC, 'Abbasid Caliphate. al-Amin. AH 193-199 / AD 809-813. AR Dirham (24mm, 2.82 g, 9h). Citing al-Mamun as wali 'ahd al-muslimin and ibn amir al-mu'minin. al-Muhammadiya mint. Dated AH 194 (AD 809/10). SICA 3 –; Album 221.4; ICV 387. VF, hint of deposits, areas of weak strike at periphery, die rust.