I will take a picture or find a picture that I took and let you see. I know nothing about them except from looking up some history online.
So far I measured the bottom bots and they are the 7-7/8", so that indicates it is a large ring Mauser. The guys at the gun shop said someone had painted over the receiving part on top, so he could not make out any marks.
I'll let you take a look. I have not even shot it yet but the LGS did say the action was good and springs tight.