Watch List notes:

Pre-reform issues, Tabaristan ('Abbasid governors). Yahya b. Mikhnaq. AH 162-165 / AD 779-781. AR Hemidrachm (23.5mm, 1.95 g, 3h). Tabaristan mint. Dated PYE 129 = AH 164 (AD 780/1). Crowned Tabaristan-type bust right / Fire altar flanked by attendants; star and crescent flanking flames; pellet above second 't' of mint name; alternating two pellets and star-in-crescents in outer margin. Malek 89.2; Album 60. Iridescent toning, deposits in devices, slight edge crimps. EF. Rare.