Watch List notes:

ABBASID: al-Ma'mun, 810-833, AR dirham (3.00g), Madinat Zaranj, AH204, A-223.4, anonymous, citing the Khorasan governor Ghassân below the reverse field, without the name of the local governor, rare date, VF-EF, RR. Very rare type, with no examples cited on CoinArchives.

Estimate: 150-200 USD