Watch List notes:

ABBASID: al-Ma'mun, 810-833, AR dirham (2.75g), Madinat Nishapur, AH195, A-223.4, citing Isma'il below obverse and al-Fadl below reverse, pleasing VF, R. Nishapur was the only mint to strike this anonymous type in AH195 - it was adopted at numerous mints in the following year, 196.

Estimate: 150-200 USD