UMAYYAD: al-Walid I, 705-715, AR dirham (2.82g), Astân, AH89, A-128, Klat-65 (different dies), only three specimens were known to Klat, and the mint was unknown to Walker, VF, RRR. The location of Astân remaining uncertain. Since all Iraqi, Iranian and Afghan region mints were closed after AH84, and none reopened until AH90, I would suggest a mint somewhere in the Caucasian area, where several mints briefly operated for very short periods between 85 and 89, such as Dabil (in Armenia) and Arran (now in Azerbaijan).
Estimate: 4,000-6,000 USD