Thanks, I will share the answer if we solve the mystery. The person I bought it from didn’t have a clue either.Hello and Welcome. I've looked to see if I could find anything similar to it, but haven't had any luck.
Definitely a special purpose tool. Someone may come along that knows what it is, but I could only make an uneducated guess.
If you find the answer somewhere else let us know. It's an interesting piece.