Not sure what I have here

[Vic103]

Thank you Rick W. for your advice. It would really suck to mess this up. I know no matter how much you plan and how careful you are, there is always the oh s**t! factor. I am still not sure what to do. You said this

Vintage Luger chambers were stepped, ie two surfaces of the chamber walls. Modern chambers are simplier, ie one surface

I tried to take a pic:



Do I have the stepped chamber?

Also I just received the byf 41 Black Widow grips in hard urethane plastic, so I installed them. They fit really nice. Makes the Luger look a lot different.