Watch List notes:

ABBASID: Al-Ma'mun 'Abd Allah (810-833), silver dirham (2.86g), Madinat Al-Salam (Baghdad) mint, AH 203. Reverse central legend with rare variety "muhammadun rasulullahi haqqa" ("Muhammad is, indeed, the messenger of Allah") instead of the usual "muhammadun rasulullah" ("Muhammad is the messenger of Allah"). A-223.4b (S). Extremely fine. Scarce.

This type recently sold in SARC auction 36 (lot 304), in similar condition, for $130.

Estimate: 100 - 120