Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Mansur, AH 136-158 / AD 754-775. Dirham (Silver, 25 mm, 2.88 g, 12 h), with the name of the heir 'al-Mahdi Muhammad ibn Amir al-Mu'minin', al-Rayy (Shahr-e Rey), AH 148 = 765/6 AD. SICA III, 784. Light toning. Very fine.