Electronic Auction 503
Lot: 522. ISLAMIC, 'Abbasid Caliphate. temp. al-Mahdi. AH 158-169 / AD 775-785. AR Hemidrachm (24mm, 2.04 g, 9h). Issue of ‘Umar ibn al-’Ala, governor in Tabaristan. Sixth Series. Tabaristan mint. Dated PYE 129 = AH 164 (AD 780/1).