That's a Kuharsky Brothers base and ring set. They have been discontinued for some time, so look on eBay and go to the gun shows. You might put a WTB in the classifieds here too.
Thanks. That is a good suggestion. Do you know if Kuharsky made the mounts that are marked Bausch and Lomb?
I also found an internet company selling original mounts in New York. I was curious about these systems and how the process of sighting the scope is with the windage and elevation on the mount. Its something I thought would be interesting for a period rifle with the Balvar scope.
Bausch & Lomb had their own system, and while similar are not interchangeable as I remember. They both work on the same principle. The base acts as two adjustable V-blocks, and the scope is held against them by spring pressure. In theory, this allowed the same scope to be used on a number of rifles, since the adjustment was in the base. It was a big selling point for Bausch & Lomb, since their scopes were expensive compared to most others. By the time I could afford one, the were obsolete.