Wotan,
I presume you mean your KS98 is marked "DRP #" for Postschutz rather than "D.R. #" for Deutsche Reichsbahn. A nice grouping!
Sorry for delay, ORPO, yes you are totally right, DRP and number below.
It is the more rare ALCOSO bajonet, not a WEYERSBERG, which are a little more "common" (in this case you cannot speak of "common" in a serious way).
Regards, wotan.