Shower plumbing question.... Help!

[Erin Caldwell]

Hello!

We are remodeling a bathroom in one of our units and as a part of that we are replacing the hardware in the shower.

My question is that I removed the previous shower faucet and thought that the new shower faucet that we purchased would fit on the old faucet. (see pictures) However, it does not fit and am wondering a couple things...

1. Can anyone tell what brand of shower faucet was on here before looking at the currently installed hardware

2. Are there adapters that I could use to attach my new handle to the existing hardware in the shower

3. How extensive would it be to replace the current hardware with a new one that was included with the shower handle (see pictures)

I would love to be able to replace this handle without having to tear up the whole shower wall - even if that means buying a different handle that would fit. As you can see I started to cut out the wall but stopped and thought I might see if anyone has easier solutions.

Any advice would be greatly appreciated! Thanks