Medieval. Islamic, 'Abbasid Caliphate, temp. Al-Rashid (170-193 AH/ 786-809 AD)
AR Dirham (25,9 mm, 2.7 g)
Citing the heir apparent Muhammad al-Amin as 'ibn Amir al-Mu'minin' ('son of the Commander of the Faithful' in Kufic) and the vizier Ja'far ibn Yahya al-Barmaki, Madinat al-Salam,