Watch List notes:

ABBASID: al-Ma'mun, 810-833, AV dinar (4.03g), NM (Egypt), AH196, A-222.1, Bernardi-81, al-'Ush-1122, li'l-khalifa al-imam on the reverse, clipped, Fine, ex Gamal Amer Collection. Struck after the rival al-Ma'mun was recognized as caliph in Egypt, but before he was officially recognized as caliph in AH198.

Estimate: 260-325 USD