Watch List notes:

ABBASID, al-Mahdi, 158-169 AH(775-785 AD). AR Dirhem (2.80 gm; 22 mm). (Abu 'Abd Allah Muhammad, b. al-Mansur), obverse, Shahadah, reverse Shahdah for Prophet Mohamad, mint Marw, year 163. Highly sought after mint for the reign. Choice VF. Toned.
Estimate: 30 USD