ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun. Dirham (Silver, 24 mm, 3.11 g, 3 h), AH 193-218 / AD 809-833, citing al-Fadl, the vizier of the Caliph al-Ma'mun, Naysabur, AH 195 = AD 810/11. SICA III, 2020. Good very fine.
From the Tabib Collection, formed over the past 40 years.
This coin was struck during the civil war between Al-Amin and Al-Mamun, the two sons of Harun al-Rashid. The war ended with the conquest of Madinat al-Salam by Al-Ma'mun and the execution of his brother, which was carried out on the 27th September 813.