Hello,
I’m new to this forum but not to shooting. Back in the mid to late 70’s I had a notion to go and hunt bison in So. Dakota. To that end I had a rifle built by the Reidl rifle co. Out of California. It is chambered for 45-120 Sharps. At the time I was interested in pushing heavy bullets fast. Recoil of the gun was robust so I never fitted it with a scope although it came with a single piece mount. Fast forward to today and I am working up some lower powered loads and a low powered scope would be a benefit. I took the scope base to the local gun shop and they were unable to match up some rings for me. Sparing everyone the dimensional details, I was wondering if anyone out there has one of these rifles with a scope on it that can give me the correct brand/version?

Might be easier to ID, if you could post a picture.
Just a guess here, but given the CA origin and the time period, it wouldn't surprise me if Riedl used Buehler bases and rings.
You can still find them on eBay, etc., but you won't find them at Brownells or Midway.

Hi 
I added this photo that shows the top of the one-piece scope mount. Presumably, it would receive a ring with a square base or at least appropriate flats with a mounting screw thru the center of the ring. So far the only thing I have seen that looks like it has the same general geometry is a Sako ring however, the hole on that ring is not counterbored or counter sunk to receive the screw.