Watch List notes:

Umayyad, anonymous, temp. Hisham, silver dirham, Ifiqiya, AH 117, wt. 2.75gms. (Klat 144, two references), very fine and extremely rare
Al-Bab is today's Derbent, in the Republic of Dagestan, Russia, located on the Caspian Sea. It is the southernmost city in Russia.

Estimate: 1800 - 2200 GBP