Viet Cong Clasp Knife

[trenchwarfare]

I used to have several Navaja, from Mexico. (similar to the one pictured) The blades, were extremely curved inward, Corvo style. It seemed, that the intended use, was for cutting the throat, from behind. One day at a show, I told my theory to an older Mexican gentleman. He shook his finger, "No, no, no." Then he motioned across his belly. Yikes!