All three are flintlocks. The middle gun appears to be of North African or eastern origin.
A couple of thing to look for on flinters -- is there a screw on the end of the pan, providing better rigidity? Is there a stirrup connecting the pan spring to the pan? These are marks of quality construction, and they appear to be missing on your guns.
That leads me to believe the long arm and lower pistol were "made for the trade" -- sort of off-the-shelf guns, probably used in Africa in the early 1900s.