Watch List notes:

ABBASID: al-Ma'mun, 810-833, AR dirham (3.26g), Samarqand, AH202, A-224, citing 'Ali b. Musa al-Rida, Imam of the Shi'ite faction, who was named heir to the caliphate as part of a failed attempt to reconcile the Sunni and Shi'ite branches of Islam, mount removed, VF, R.

Estimate: 180- 220 USD