Proof marks onGrip Screws

[Doubs]

Originally Posted by barr44

I appreciate the info, but it is somewhat confusing as to why Erfurt grip screws would be on said pistol, unless Erfurt supplied parts to the Ulm factory, I suspect it is one of those areas where there is no definitive answer. Again I thank all for the inputs.B

If it was commercially proofed at Ulm then the chances are that it was repaired at some point. That repair may have included replacing the grip screws. (That alone would not be cause to be proofed again. Re-proof is done after replacement of certain parts such as the barrel, breechblock etc.) The screws may also have been replaced many years before that. As you say, there is no definitive answer to that question.