Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun. AH 199-218 / AD 813-833. AR Dirham (26.5mm, 2.97 g, 3h). Citing al-Rida as heir and Dhu'l-Riyasatayn. Nisabur (Nishapur) mint. Dated AH 203 (AD 818/9). Album 224; ICV 391. Light deposits in devices, marks. VF. Rare.