Kuduae, I was not aware that the Collath factory was that large. The markings on this rifle are W. Collath & Sohne. Actually I hate to admit it but I was looking at the wrong Frankfurt:). Getting the right one makes this alot clearer.
I should have mentioned that the chamber is for the 8x57S cartridge also. Actually the neck measures the same as my J.P. Sauer 1943 K98. The rifle actually shoots a fairly hot load with a 220gr Sierra bullet to the sights at 100yds.
There are no holes in the stock for a warning plate, I think that may have been the sporter that John303 has posted here that you responded to. Thanks for the link to your post on the German gun board, I will go back and reread that again. Thanks Again for your reply.