Re: Kollmorgen Riflescope??
I seem to remember something written about the Kollmorgens being used on some early US sniper rifles, mostly M1Cs and Ds, though they were never standard issue like the M72 and M73 scopes. There were a lot of limited runs of various scopes used in this application during the later days of WWII and then Korea, mostly on an experimental basis. I think Peter Senich has written some on this combination, but I'd have to do some digging through my reference stuff to nail it dow. Don't know anything about the commercial side of the Kollmorgens, sorry!