Watch List notes:

'Abbasid Caliphate. temp. Al-Ma'mun. AH 199-218 / AD 813-833. AR Dirham (23.8mm, 2.65 g, 10h). Madinat Naysabur mint. Dated AH 197 (AD 812/3). Citing 'Abdallah in obverse outer margin and Dhu'l-Riyasatayn in reverse field. Lowick 2333; Album 223.4. Toned. VF.