Watch List notes:

ABBASID: al-Muwaffaq, 875-892, AR donative dirham (2.73g), Isbahan, AH276, A-B241, without the name of the actual caliph, his incompetent brother al-Mu'tamid, citing al-Muwaffaq on the obverse and his honorary title al-Nasir li-din Allah on the reverse, mount removed (as virtually always with this donative type), VF, RRR.

Estimate: 500-700 USD