Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Mahdi, AH 158-169 / AD 775-785. Fals (Bronze, 21 mm, 3.78 g, 7 h), citing the governor Yazid ibn Usayd, Dabil (Dvin, the capital of Armenia), AH 159 = AD 775/6. Vardanyan 2011, 252. A very rare mint. Patina stripped, otherwise, good very fine.