Bavandid Dynasty. Rustam bin Sharwin (Shervin) (964-980). AR Dirham. AH 366. Firrim mint.

Bavandid Dynasty. Rustam bin Sharwin (Shervin) (964-980). AR Dirham (3.90g/ 29mm). AH 366. Firrim mint. 
Album-1524. Classified Rare.

Many dirhams of this ruler bear his name not in the field but as
part of the inner obverse marginal inscription (same rarity).
Rustam’s dirhams are the earliest eastern coinage to bear the
Shi‘ite inscription ‘ali wali Allah. Most examples aso cite the
current Buwayhid overlord and the Sunni ‘Abbasid caliph.