Watch List notes:

Abbasid, al-Ma'mun, AH 199-218 (AD 813-833). AR dirham (2.60 gm; 26 mm). Samarqand Mint. Dated AH 200, citing Dhul-Riyasatayn (al-Fadl b. Sahl) on reverse. Album-223.4. Choice AU. Toned.