Watch List notes:

ABBASID: al-Ma'mun, 810-833, AV dinar (4.25g), Misr, AH201, A-222.6, citing al-Fadl, Dhu'l-Ri'asatayn, and the governor of Egypt, Sulayman, some original luster, superb strike, About Unc.

Estimate: 300-350 GBP