EditorialCoin, A.H. 164/A.D. 780, Excavated in Iran, Nishapur, Gold, Diam. 11/16 in. (1.7 cm), Coins, Issued during the reign of the Abbasid caliph al-Mahdi, this gold dinar was minted in the year A.H. 164 (A.D. 780). The inscription on its obverse proclaims th...