ABBASID: AE fals (2.59g), Jabal al-Fidda, AH155, A-A326, citing the governor Rawh as the 'amil of 'Iyad, the mawla under the future caliph al-Mahdi, excellent strike without any weakness, VF, R. The mint name means "silver mountain ", referring to a silver mine in Khorasan, not far from Herat.
Estimate: 90-120 USD