Drachm - Mujashi' Eastern Sistan - Arab-Sasanian

Mujashi' ibn Bishr al-Kilabi served as governor of Sistan under the early Abbasids, and coins struck in his name occupy an awkward transitional moment — the Abbasid revolution had toppled the Umayyads in 750, but the eastern provinces continued issuing debased Arab-Sasanian types that aped the old Sasanian drachm format rather than adopting the reformed dirham coinage that Abd al-Malik had introduced decades earlier. Sistan was simply too far from the administrative center for standardization to bite quickly.

The weight here — well below the canonical 3.9 g of the Sasanian prototype — reflects decades of incremental debasement across the eastern mints.