It's possible that:
* The title is slightly different: Perhaps the title has a slight variation, like a different spelling or a different word order.
* The release year is off: It's possible the film was released in a slightly different year.
* It's a lesser-known film: Some films, especially from the 1960s, may not have extensive online information.
To find the information you're looking for, I recommend trying the following:
* Check online movie databases: Websites like IMDb, Letterboxd, and TMDb are good resources for finding movie information. You can search for the title with slight variations in spelling and release year.
* Use a search engine: Try searching for "Bombenwalzer 1968" on Google or another search engine. You may find relevant articles or forums discussing the movie.
* Check movie archives: Some national film archives may have information about films released in specific years.
Let me know if you have any other details about the movie, like the genre, director, or plot, and I'll do my best to help you find the information.