ItemNo: 2036
Acc_no: AR0022
Ruler: Umar ibn al-Ala (771-780 AD)
Dynasty: Abbasid Caliphate
Denomination: AR hemidrachm
Mint: TARWRSTAN (Tabaristan)
Date: 122 PYE
Weight (g): 1.81
Diameter (mm): 23
Die Axis: 3:30
References: Malek 2004, no. 66.1