Watch List notes:

Pre-reform issues, Tabaristan ('Abbasid governors). Umar b. al-'Ala. AH 155-165 / AD 771-780. AR Hemidrachm (22.9mm, 1.93 g, 2h). TPWRSTAN (Tabaristan) mint. Dated PYE 127 = AH 162 (AD 778/9). Malek 78.1; Album 56. Lustrous. AU.