ISLAMIC, 'Abbasid Caliphate. temp. Al-Mahdi, AH 158-169 / AD 775-785. Drachm (Billon, 25 mm, 2.07 g, 10 h), Lords of Bukhara, Bukhara. Crowned and draped bust to right; behind, 'al-Mahdi' in Kufic; before, 'Lord of Bukhara' in Sogdian. Rev. Sasanian fire altar, which is the outline of the divine head facing right, flanked by two attending priests (mabedh) standing facing each other. Album 94. Walker, Arab-Sassanian, 319ff. Nicely toned. Very fine.