Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. al-Mahdi. AH 158-169 / AD 775-785. AR Hemidrachm (25mm, 1.93 g, 4h). Issue of 'Umar ibn al-'Ala, governor in Tabaristan. Sixth Series. Tabaristan mint. Dated PYE 127 = AH 162 (AD 778/9). Stylized crowned Sassanian style bust right; 'mr in Arabic to right; 'pd in Pahlavi to lower right in outer margin; nwk' in Pahlavi to lower left / Fire altar flanked by attendants; pellets flanking flames; date to left, mint to right; alternating triple pellets and star-in-crescents in outer margin. Malek 78.1–9; Album 56; ICV 104. Iridescent toning. EF.