Watch List notes:

ABBASID: al-Ma'mun, 810-833, AR "dinar" (4.31g), AH208, A-223.5var, double margin obverse; contemporary imitation, based on the double-margin gold dinar type A-222A but struck in silver, some adhesions on the reverse, very interesting piece of unknown origin, F-VF, RR.

Estimate: 100-150 USD