ABBASID: al-Mu'tamid, 870-892, AR dirham (2.89g), Samarqand, AH279, A-240.8, citing the caliph and the heir al-Mu'tadid, with the letter S below the reverse, as found on the contemporary copper coins that cite the Samanid ruler Isma'il b. Ahmad, thus technically considered Samanid as well as Abbasid, VF to EF, RR.
Estimate: 150-200 USD