I'm not sure the exact year on this ad, but it is probably from around the same time Der Wienerschitzel had locations here in Springfield, Mo (Early 70s?). Notice the picture of Der Wienerschitzel's building shown at the end of the commercial. When Der Wienerschitzel closed, those buildings became cashew chicken restaurants.
I wish some someone would find a good copy of that commercial. They always look fuzzy.