Watch List notes:

ABBASID: al-Ma'mun, 810-833, AV dinar (4.19g), Misr, AH201, A-222.7, Bernardi-89De, Khedivial-558, citing Tahir, with his epithet dhu'l-yaminin ("possessor of two right hands"), and the governor al-Sari, couple small scratches on the obverse, Fine to VF, ex Gamal Amer Collection.

Estimate: 220-280 USD