I have a 12 inch rod which looks very similar, with sn 10162 on the side. I don't think either of these are German, but possibly Yugo or maybe a FN/Czech product. The Germans numbered the rod with the last digit(s) of the rifle serial number (usually the last two). Never saw one with a alpha prefix and a capital letter at that. It appears the rod may have been cut down to 10 inches as well, due to the thread pattern, taper on the end, and no "clean-out groove" where the last thread meets the base of the rod. I took the one I had and cut it down to 10 inches myself... just as a "filler", for a shooter K98 I wanted to put a rod in (and not ruin a good rod).