Good day,
I was searching for big Zundapp Vikings on IMCDB and only found one movie.
Another movie I know is "Noi cei din linia intai" (Romanian - We from the front line) and the Zundapp is featured https://www.youtube.com/watch?v=LCS6UY9AZSM from 2'30" and another time near the end.
Any other KS 750 apparitions to be added here. Thanks.