Hi Ron,
I found an English-Hungarian translation site and decided to feed k�¼ into it to see what it would come up with.
To my complete surprise it gave some full words starting with k�¼ that actually made some sense, giving the idea that it was a Hungarian abbreviation of some sort.
One nice translation was: kÃ?¼lszÃ?Â*n = air
And what about
: k�¼lf�¶ldi = foreign
Isn't that nice?
I guess there's still a lot of digging to do regarding Eastern European WW2 marking/production/etc... but I'm hopeful. Just keep looking for a similar mark or text on other equipment.