ISLAMIC, 'Abbasid Caliphate. temp. Al-Ma'mun, AH 199-218 / AD 813-833. Dinar (Gold, 17 mm, 3.48 g, 12 h), citing the governor of the Yemen, Muhammad ibn Ali ibn 'Isa ibn Mahan, Without mint name (San'a), AH 202 = AD 817/8. Album 1050.1. Bernardi 112. SICA X, -. Rare. Clipped and with some nicks, otherwise, very fine.