Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. al-Mahdi. AH 158-169 / AD 775-785. AR Hemidrachm (25mm, 1.98 g, 6h). Issue of 'Umar ibn al-'Ala, governor in Tabaristan. First Series. Tabaristan mint. Dated PYE 120 = AH 155 (AD 771/29). Stylized crowned Sassanian style bust right; 'wml in Pahlavi to right; 'pd in Pahlavi to lower right in outer margin / 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 61.1–3; Album 56; ICV 104. Iridescent toning, faint scratches. EF.