Arab-Sasanian, Abbasid Governors of Tabaristan, silver Hemi-drachm, Post-Yazdegerd Era, anonymous AFZWT type, 23mm, 1.93g, Tabaristan mint, obverse; Sasanian-style bust right, reverse; fire-altar and attendants, date at left; PYE 136 (= AH 171 = 787 CE), cf. Mitchiner (A&C)# 1384, Album-111, AUNC
