Watch List notes:

Abbasid, al-Ma'mun, AH 194-218 (AD 810-833). AR dirham (2.76 gm; 25 mm). Samarqand mint. Dated AH 198. Pellet below, on mint side / al-Ma'mun named as iman and amir al-mu'muiasu. Citing al-Fadl. Album 223.3. Choice AU. Lightly toned.