MIRDASID: Asad al-Dawla Salih, 1023-1029, AR dirham (1.09g), NM, ND, A-766, also citing his son al-amir abu 'ulwan thamal bin al-amir asad al-dawla on the reverse, presumably as heir to the throne, plus the Fatimid caliph al-Zahir (1021-1036) in the reverse margin, F-VF, RR.
Estimate: 400-500 USD