Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Mahdi, AH 158-169 / AD 775-785. Dinar (Gold, 18 mm, 4.00 g, 1 h), without mint, AH 162 = AD 778/9. Bernardi 51. Slightly clipped and with minor graffiti, otherwise, very fine.