The action/receiver looks suspect to me. The steel is a uniform color and that color looks like aluminum (NOT saying it is)and the engravihng so worn it looks like it was stamped and not cut. I wouldn't be surprised if some clown sandblasted it at some point of "restoration".

And yeah, the wood does look oil soaked.

The whole piece somehow doesn't "hang" together well, it looks piecemeal rather than whole.