Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Mahdi, AH 158-169 / AD 775-785. Dinar (Gold, 18 mm, 4.12 g, 6 h), without mint, AH 165 = AD 781/2. Bernardi 51. Minor graffito on the reverse and with light marks, otherwise, good very fine.