Watch List notes:

Pre-reform issues, Tabaristan ('Abbasid governors). Umar b. al-'Ala. AH 155-165 / AD 771-780. AR Hemidrachm (23.8mm, 1.97 g, 3h). TPWRSTAN (Tabaristan) mint. Dated PYE 123 = AH 158 (AD 774/5). Malek 67.2; Album 56. Choice EF.