Watch List notes:

ABBASID: al-Mustazhir, 1094-1118, AV dinar (2.76g), Madinat al-Salam, AH491, A-B266, Jafar-A.MS.491, also citing the caliphal heir apparent 'Umdat al-Din Abu Mansur, struck from deteriorating dies, which would account for minor "crease" across the center, EF-AU, RR. Surprising, during every year from 491 to 496, three distinct dinars were struck annually, one purely Abbasid, another citing both the Abbasid caliph and the Great Seljuq ruler Barkiyaruq, the third citing both the Abbasid caliph and the Great Seljuq rival Muhammad!

Estimate: 750-900 USD