The original Ford Model A grease guns in Germany have the words "Deutsche TECALEMIT D.R.R" (D.R.P. = Deutsches Reich Patent, 1877 to 1945) written above the Ford script on the barrel. There are no other markings or numbers.
Here is the best I could do for a photo of what it looks like:
Other than that, the German grease gun appears to be the same as the US versions.
Fordially,
Brad in Germany