What model?

Robert M. Gary wrote:

I just bought a Brittan turn coordinator off a Bonanza on ebay. I'm
curious how to open it up so I can see the gyro, et. al. I took the
back off but that only gained me access to some capacitors on the
back. I tried to take the face apart but that didn't seem to be the
way to do it. How can I open it up so I can get a good visualization
of how it works?