Folding bayonet

[Bayowolf]

I didn't want to clutter up Fernando's thread on Navalhas. So started another thread for this. Can anyone tell the country of origin for this folding knife? Is it a Navaja, Navalhas, or perhaps from Italy? It has the ring for assistance in releasing the lock, but not ratchet. Oddly, it seems to be made or modified to fit to a hunting rifle as a bayonet.