Watch List notes:

ABBASID: al-Ma'mun, 810-833, AV dinar (4.48g), NM, AH211, A-222.x, Bernardi-, totally anonymous and without mint, local imitative type, with Allah above and rabbi below the reverse field, date somewhat crudely engraved but almost certainly 211 (the final digit "1" boldly clear), minor weakness, appears to be unpublished, possible of Yemeni origin, VF, RRR.

Estimate: 260-350 USD