Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Mansur, AH 136-158 / AD 754-775. Dinar (Gold, 19 mm, 4.20 g, 6 h), without mint, AH 157 = AD 773/4. Bernardi 51. Minor graffito on the reverse, otherwise, about extremely fine.