Watch List notes:

ABBASID, AL-MA'MUN (194-218h), Dirham, al-Muhammadiya 202h. Reverse: citing the Shi'ite al-Rida as heir to the caliphate. Weight: 2.93g References: Lowick 1964; Miles, Rayy 103. Staining on obverse, otherwise good very fine and rare
(400-600 GBP)