Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun, AH 193-218 / AD 809-833. Dirham (Silver, 25 mm, 3.00 g, 2 h), Madinat Isbahan, AH 207 = AD 822/3. SICA III, 404. The flan slightly wavy, otherwise, about extremely fine.