ISLAMIC, 'Abbasid Caliphate. temp. al-Mu'tasim. AH 218-227 / AD 833-842. AR Damma (11mm, 0.45 g, 10h). In the name of of Musa Barmaki, 'Abbasid governor of Sindh (circa AH 218-221 / AD 833-836). F&T CS18; Album –; ICV –. Toned, weak strike on reverse. Near VF.