panzerschrek: Welcome aboard -- and thank you much for contributing to the serial number data base! The letters (and, less often, numbers) stamped on the front portion of the left receiver rail seem to appear most often on Danzig Gew 88 rifles (I have seen them -- albeit much less frequently -- on 88s made at other arsenals). One German collector with whom I have corresponded suggested that these were workers' stamps relating to rebuild or repair episodes. I've also dealt so often with the same situation of mismatched or (at best) partially matched serial numbers on the Gew 88s in my collection.

