First Arabic coins before the reform of Caliph al Malik, 7th century, rare

AE 22 Halab (Aleppo) c. 645-705 ne. Arab coins with a caliph in front and a modified cross on a pedestal on the reverse, modeled on the reverse of Byzantine solids.The imitation was in keeping with the Byzantine minting in operation before the monetary reform of Caliph al-Malik; state III, patina; MITCH.ISLAM 17-18