Hi Jason,
I think it is a Mamiya 645 AFD mount, because the guy I bought it from had a Mamiya AFD, and told me he was moving up to a larger back. I never thought about the Pro/AFD part, because I've always used it on a technical camera. I don't own any MF camera! But the mount itself is interchangeable, and it does have the electronic contacts. For RZ, I think any Mamiya AFD to RZ adapter should work.
Let me know if you'd like some pictures of the back.
Cheers,
Kumar