Watch List notes:

ABBASID OF YEMEN: al-Ma'mun, 813-833, AR local dirham (1.07g), San'a, AH202, A-1050, citing Muhammad [b. al-Ifriqi] at lower obverse, no names in reverse field, F-VF, RRR. Unpublished by Lowick, not on CoinArchives, but another example is now filed on Zeno (#133930, from the American Numismatic Society).

Estimate: 200-250 USD