Arab-Sasanian (Tabaristan): AR Hemidrachm PYE 137 (788-89 AD); Sulayman b. Musa (787-789). Abbasid Governor of Tabaristan, PYE 136-138. Obv: Crowned Sasanian-style bust right, instead of a face, a diamond with Arabic word 'bakh'. Governor's name in Arabic to right of bust. Rev: Fire altar flanked by attendants; to left, date. (1.96gm, 23mm), Very Fine.