ABBASID: al-Radi, 934-940, AR dirham (4.01g), Halab, AH323, A-255.1, mint name recut over Hims, VF-EF, RR. Reengraved mint names are found quite frequently for silver dirhams from the time of al-Mu'tadid (AH279-289) through al-Muttaqi (329-333), but are surprising rare for gold dinars.
Estimate: 200-300 USD