Lot 590
590
Abbasid, al-Ma'mun (194-218 AH 810-33 AD), Dinar, 3.49g., reform style, without mint, 212, rev. inner marginal legend li-'Abdallah al-Imam al-Ma'mun Amir al-Mu'minin 'ala yaday Ahmad, slightly clipped and a little grafitti in the reverse fields, extremely fine, apparently unrecorded
Abbasid, al-Ma'mun (194-218 AH 810-33 AD), Dinar, 3.49g., reform style, without mint, 212, rev. inner marginal legend li-'Abdallah al-Imam al-Ma'mun Amir al-Mu'minin 'ala yaday Ahmad, slightly clipped and a little grafitti in the reverse fields, extremely fine, apparently unrecorded

Details
Abbasid, al-Ma'mun (194-218 AH 810-33 AD), Dinar, 3.49g., reform style, without mint, 212, rev. inner marginal legend li-'Abdallah al-Imam al-Ma'mun Amir al-Mu'minin 'ala yaday Ahmad, slightly clipped and a little grafitti in the reverse fields, extremely fine, apparently unrecorded

Lot Essay

This is almost certainly a Dinar struck in the Yemen by the governor Ahmad b. Muhammad al-'Umari (211-212 AH). It is the only known Abbasid Dinar with 'ala yaday, 'by the authority of' in its legends.