'Abbasid Caliphate. temp. Al-Mansur. AH 136-158 / AD 754-775. AR Dirham (24.1mm, 2.89 g, 8h). Al-Hashimiya mint. Dated AH 138 (AD 755/6). SICA 3, —; SCC 845; Lowick 1077; Album 213.1. Minor staining. VF. Rare.
The rare mint of al-Hashimiya was only active for a few years during al-Mansur's reign.