Hi Nahpatronen,
My thanks for posting Mr. Gibson's list. Please, in the future - if you post information taken from a source, please acknowledge that source, as it assists in several aspects of research, and as importantly, gives credit to the original researcher/author.
If information is your own - also, please note that as well, as then you are given credit (and folks will more easily challenge you

). Seriously - thanks for understanding...
However, I didn't ask about the prefix or suffix for price reasons - rather, if you look at Gibson's list - you will note the majority of pre "31XX" have the KU as a suffix - post that number, it is a prefix. My question, rather - was to see where Hugh's KU fell - as I also note two of your excellent KUs fall outside that "normal" pattern as well.
Anyway - my thanks again for your fine photos and adding Mr. Gibson's list to this thread. KU Lugers are still a debated mystery as to their origin and final "customers", so any good information is appreciated!!
Best Always,
- John