★ An interesting dirham citing al-Ma'mun as Wali 'ahd al-Muslimin ★

ISLAMIC, 'Abbasid Caliphate. Al-Amin, AH 193-199 / AD 809-813. Dirham (Silver, 25 mm, 2.93 g, 11 h), citing al-Ma'mun, the brother of the caliph, as Wali 'ahd al-Muslimin ('successor of the covenant of the Muslims' in Kufic) and as ibn Amir al-Mu'minin ('son of the Commander of the Faithful' in Kufic), Madinat Bukhara, AH 194 = AD 809/810. SICA III, 496. Minor marks, otherwise, very fine.

From the Tabib Collection, formed over the past 40 years.