Oriental Greek & Central Asian TABARISTAN. 'Abbasid governors. 'Umar b. al-'Ala, PYE 120-129/30 / AH 155-164/5 / AD 771-782. Hemidrachm (Silver, 23 mm, 1.84 g, 10 h), PYE 127. Sasanian-style bust to r
Oriental Greek & Central Asian TABARISTAN. 'Abbasid governors. 'Umar b. al-'Ala, PYE 120-129/30 / AH 155-164/5 / AD 771-782. Hemidrachm (Silver, 23 mm, 1.84 g, 10 h), PYE 127. Sasanian-style bust to r