Watch List notes:

ISLAMIC, 'Abbasid Caliphate. al-Mahdi. AH 158-169 / AD 775-785. AR Dirham (25mm, 2.56 g, 10h). Citing Yazid and with seal of Solomon to left of annulet. al-'Abbasiya mint. Dated AH 167 (AD 783/4). Album 215.2; ICV 379. VF, toned, light scratches and minor ghosting, slight die rust on reverse.