Vlim, I found this thread on KU Lugers from 2011 of which you replied. This is what I was talking about on the through research of Lugers. I've yet to thoroughly read the article, and to be honest, most of it is WAY over my head! But from your post here, It looks like since the 2011 article there is still questions as to the KU Lugers that are not answered. This is more like the questions I ask about Luger mysteries not yet fully understood.
https://luger.gunboards.com/showthre...-Ku-Luger-fans