Dry Transfer Lettering — Germany — perhaps circa 1970 ?

I might also be looking for help with a blackletter font ID, but for now, looking for any advice on what companies had significant market share for dry transfer lettering (such as Letraset) in German-speaking countries (Germany, Austria, Switzerland) circa 1970. Anyone besides Letraset?

I started by just doing a quick look through ... every blackletter typeface on MyFonts. 853 families later, not one was even close!