Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun, AH 193-218 / AD 809-833. Dirham (Silver, 24 mm, 2.96 g, 3 h), citing the great vizier of the caliph, Dhu'l Riyasatayn al-Fadl, Madinat al-Salam (Bagdad), AH 198 = 813/4. Album 223. SICA III, 1734. Lightly toned. Good very fine.