Watch List notes:

ISLAMIC, 'Abbasid Caliphate. Al-Mahdi, AH 158-169 / AD 775-785. Dirham (Silver, 25.5 mm, 2.66 g, 3 h), Ifriqiya (possibly minted in Tunis), dated AH 168 = 784/5 AD. Album 215.2. Rare. Very fine.