BAVANDID OF TABARISTAN: Rustam b. Sharwin, 964-980, AR heavy dirham (6.04g), Firrim, AH366, A-1524, ruler's name in tiny letters at the top of the obverse, in the form bi-amr rustam, name of the Buwayhid overlord Rukn al-Dawla also on the obverse; Shi'ite kalima on reverse, with letter J below, some rim adhesions, VF to EF, RR.
Estimate: 110-140 USD