Looks like a strange, huge version of a Moro helmet.

If the handle was removable and a chin strap installed . . . . . . .
Nice sheild. I have never seen such a pronounced hump before. I really like it. If you ever want to part with it, please let me know.
I have several of these sheilds, and mine all have stitched places as though they were patched. If you look carefully at the one from Oriental Arms, it has several patches.
I always wondered why? Battle damage? Was the animal killed there by something sharp? Did it tear when they were forming and stretching the green leather? Something to make the sheild look more "real?"
One of mine has a rolled up edge. Makes it look like a Mexican sombrero. (With patches).
But most of the other leather sheilds I have do not have patches, even the Abysinnian and Turkana.