Coin, Abbasid Caliphate, al-Mu'tasim, Dinar, AH 226 (840/841), Madinat al-Salam. Abbasid Caliphate, al-Mu'tasim (AH 218-227/833-842 AD), Dinar, Madinat al-Salam. Album 225, Citing the governor Ja'far on obverse.