Watch List notes:

ABBASID: al-Ma'mun, 810-833, AV dinar (4.24g), Madinat al-Salam, AH198, A-222.12A, mint name below the obverse field, citing al-Ma'mun's vizier below the reverse as dhu'l-ri'asatayn, lovely strike, bold VF-EF, RRR. Mint name added perhaps to commemorate the conquest of Baghdad by al-Ma'mun and the demise of the rival caliph al-Amin in AH198.

Estimate: 1,500-2,000 USD