Watch List notes:

ABBASID: al-Ma'mun, 810-833, AV dinar (4.23g), NM, AH201, A-222.12, citing the vizier as Dhu'l-Ri'asatayn below the reverse and with the location al-'iraq and the extra letter 'ayn below the obverse; bold strike, strong EF.

Estimate: 300-400 USD