Vintage Horse Mouth Demonstrator

Straight from the horses mouth. This piece was on the wall of some old school veterinarian. I imagine the exchange going something like this. (innocent person) Hey what is that? (vet) Oh that is a horses mouth. (innocent person) Wow that is strange! (vet) Yes, please allow me to show you. (innocent person) F.M.L! Piece is mounted on wood plaque with hinge on back to fully horrify you, me and everyone we know. Oh--yes the horses teeth are real.  Measures: 7" H x 3 3/4" W