Watch List notes:

ISLAMIC, 'Abbasid Caliphate. al-Hadi, AH 169-170 / AD 785-786. Fals (Bronze, 20 mm, 2.73 g, 12 h), citing Khuzayma ibn Kazim, al-Haruniya, AH 169 = AD 785/6. Vardanyan 2011, 259. Very rare. Cleaning scratches and some deposits, otherwise, good fine.