ISLAMIC, 'Abbasid Caliphate. temp. Al-Mahdi, AH 158-169 / AD 775-785. Drachm (Silver, 33 mm, 4.00 g, 9 h), eastern Sistan series, citing Qudama, Sistan, circa AH 150/160s = AD 770s. Crowned and draped Sasanian-style bust to right; behind head, AFZUT GDH ('may his kingship increase' in Pahlawi); before head, HWSRWD ('Khosrau' in blundered Pahlawi); in outer margin, 'Qudama', 'bism Allah' ('In the name of Allah') and 'Rabbi' ('my Lord') in Kufic. Rev. Fire altar flanked by two attendants; to left, blundered date; to right, blundered mint. Album 86. Very rare and beautifully toned. Struck from somewhat worn dies, otherwise, very fine.