That is a really nice looking Koummya. I especially like the detail on the scabbard. The overall craftmanship looks very good. I don't have enough knowledge of the blades to make a more accurate assesment as to it's origin. But it looks like you and Battara have already I.D.'ed this one.
I see what you mean by both cutting edges being a bit shorter than the typical Moroccan style. Is that common with Tuareg style blades ?