Hi Detlef,
You could be correct about the age of your sword. Always hard to judge age of these items from pictures.
I tend to be conservative about the markings on your sword that I described earlier in this thread, because I have only seen them on swords that I would consider post-WWII in manufacture. Similarly, I've not seen the "turtle" mark or those spine markings on "antique" swords. Always willing to be proven wrong.
Also, please note that I use the term "vintage" for items 50-99 years old, and reserve "antique" for 100+ years old. Thus, "vintage" includes part of the period you describe.
Regards, Ian.