Byzantine-Arabic fels before the reform of Caliph al Malik, 7th century, rare

Byzantine-Arabic fels before the reform of Caliph al Malik, 7th century, rare; AE 17 Hims (Emesa) c. 640 ne Arab imitation of Byzantine folis; with emperor in front and large letter M=40 nummi on reverse, but Arabic inscriptions.The imitation was part of the Byzantine minting in operation in the region of Syria, Palestine and Mesopotamia; condition III, patina; MITCH.ISLAM 9-14;