Watch List notes:

ABBASID, al-Mahdi, 158-169 AH (775-785 AD). AR Dirhem (2.86 gm; 24 mm). (Abu 'Abd Allah Muhammad, b. al-Mansur), obverse, Shahadah, reverse Shahdah for Prophet Mohamad, followed by phrase "Al Khalifah Mahdi" mint Marw, year 165. Highly sought after mint for the reign. Choice EF. Toned.
Estimate: 75 USD