Watch List notes:

ISLAMIC, 'Abbasid Revolution. Anonymous. Dirham (Silver, 26 mm, 2.86 g), Abbasid Revolution, struck under Abu Muslim, Marw, AH 132 = AD 749/50. SICA II, -. A few minor nicks, otherwise, very fine.

This interesting dirham was struck towards the end of the Abbasid Revolution, also known as the Movement of the Men of the Black Raiment.