ABBASID: al-Rashid, 786-809, AR dirham (2.82g), Dimashq, AH189, A-219.10a, Lowick-602, citing the heir al-Ma'mun as mimma amara bihi al-amir al-ma'mun without any other words, extremely rare one year type, slightly wavy surfaces, VF, RRR.
Estimate: 400-500 USD