Watch List notes:

ISLAMIC, 'Abbasid Caliphate. Al-Musta'in, AH 248-252 / AD 862-866. Dinar (Gold, 17 mm, 2.95 g, 12 h), citing the caliph al-Musta'in billah and the heir apparent al-Abbas as 'ibn Amir al-Mu'minin' ('son of the Commander of the Faithful' in Kufic), Misr, AH 249 = AD 863/4. Bernardi 161De. Clipped and with a few scrapes and a slightly wavy flan, otherwise, good very fine.