ISLAMIC, 'Abbasid Caliphate. temp. Al-Hadi, AH 169-170 / AD 785-786. Dirham (Silver, 24 mm, 2.85 g, 6 h), citing Ibrahim and Jarir and the future caliph Harun al-Rashid as ibn Amir al-Mu'minin ('son of the Commander of the Faithful' in Kufic), al-Haruniya, AH 170 = AD 786/7. SICA III, 2046. Very rare. A well struck and lightly toned example. The flan slightly wavy, otherwise, about extremely fine.
From the Tabib Collection, formed over the past 40 years.
This interesting issue from the short reign of Al-Hadi mentions his younger brother and future successor Harun al-Rashid.