Watch List notes:

ABBASID OF YEMEN: al-Ma'mun, 813-833, AV dinar (3.86g), NM, AH203, A-A1050.1, citing the governor Muhammad [b. al-Ifriqi], clipped down, as virtually always for the Yemeni issues struck during the caliphate of al-Ma'mun, choice EF, RR.

Estimate: 900-1,100 USD