Bavandids of Tabaristan. Rustam b. Sharwin. Circa AH 353-370 / AD 964-980. AR Dirham (28.3mm, 2.30 g, 3h). Firim mint. Dated AH 369 (?) (AD 979/80). Ruler's name in reverse margin, after sanat in mint/date formula. Album 1524. Unit of date weak. Pierced, minor loss at edge, slightly bent flan. Good Fine. Rare.