Islamic. Pre-reform issues, Tabaristan ('Abbasid governors). Sulayman b. Musa. AH 171-173 / AD 787-789. AR Hemidrachm (1.8 g, 24mm). Tabaristan mint. Dated PYE 137 = AH 172 (AD 788/9). Crowned Sasanian style bust right, with face replaced by rhomboid bearing Arabic bakh (= good); 'pd and nwk' in Pahlavi in outer margin. R/Fire altar flanked by attendants; stars flanking flames. Malek 101.1-5; Album 65.