Hello!
I received recently a small follis. When I was buying it I thought it's just a Heraclius follis, probably from Constantinopole. Now, I'm not so sure about that because of the strange "M" on the reverse. I know almost nothing about arab-byzantine coinage but is it an imitation of Cyprus follis?

And second question, is there a countermark on the obverse or is it just my imagination? I've done my best with the photos, I'm not able to do anything better.


I don't know is it helpful but coin has about 18,3-26,5 mm and 3,5 g.
Thanks for help!