Watch List notes:

ABBASID: al-Ma'mun, 810-833, AR dirham (2.59g), Dimashq, AH200, A-223.8a, Lowick-606, with the unexplained word, tentatively read as tabuk, in the obverse margin, citing the governor Muhammad b. Bayhas in the reverse field, slightly clipped, decent strike, VF, RR. No example of this year recorded on CoinArchives.

Estimate: 300- 400 USD