Watch List notes:

Tahirid. Tahir b. al-Husayn, in rebellion, AH 205-207 (AD 821-822) AR dirham (2.36 gm; 26 mm). Madinat al-Herat mint. Dated AH 206 (AD 821/2), citing the Governor al-Shukr bin Ibrahim. Album 1391A; ICV 1415. Light porosity. Choice EF. Lightly toned. Rare.