Considering people regularly pay $1400-$1600 for Lugers not in nearly as good shape I'd say it was a pretty good weekend for yard sales up in Maine. Mag mismatch is typical, and not a huge deal.... Is that multiple crown/RC markings? I know the Erfurt Lugers are often seen with the crown / RC mark but I haven't seen many with it in multiple places and a matching pistol. Not sure if that's rare, or adds to the value but I find it interesting... Nice to see a original matched set of grips without the safety chip. Wood bottom to the mag looks solid as well, another very nice plus!
Good things happen to those that are patient, looks like by our wait paid off!
Good question on the Crown/RC stamp, and it caused me to do a little searching. Here is an excellent summary of the entire Revision Commission process, and quality control at both Erfurt and DWM.
Question: crown over RC
Bottom line, I would surmise, is that while the parts were initially rejected for possible specification reasons, if it ultimately received the C/RC stamp, then it was deemed to be functional and thus used for assembly.
It stands to reason that for a later war production, such as my 1918 Erfurt, would have had a higher likelihood of receiving earlier rejected parts that were subsequently approved by the Revision Commission - even as a stamped matching unit. Desperate times called for desperate measures.