ISLAMIC, Persia (Pre-Seljuq). Buwayhids (Buyids). Rukn al-Dawla Abu 'Ali al-Hasan. AH 338-366 / AD 949-977. AR Dirham (29mm, 3.57 g, 3h). Tustar min al-Ahwaz (Ahvaz) mint. Dated AH 356 (AD 966/7). Treadwell Tu356; Album 1747A. VF, weakly struck, small hairline flan crack.