Thanks for all the suggestions so far but I have tried most of the suggested camera mounts and come up empty. The lens is a Schneider-Kreuznach Tele-Variogon 1:4/80-240. The other little mystery is the filter that came with it which is unmarked except for the orange ring around it. It can be seen, in place, between lens body and the hood. The other interesting thing is that the lens mount appears to be changeable. Wish I could find the Nikon F mount for it.
Bob
Edit
Yea, checked the Schneider-Krueznach site but could not find any photos of the different mount adapters they had.
Bob