ISLAMIC, 'Abbasid Caliphate. temp. al-Ma'mun. AH 199-218 / AD 813-833. AR Dirham (26mm, 2.89 g, 2h). Dimashq (Damascus) mint. Dated AH 213 (AD 828/9). Album 223.4; ICV 390. Toned, weakly struck reverse with minor ghosting, slightly wavy flan. Near VF. Very rare, struck at this mint for only two years.