Old NAZI knife

Here’s a police dagger from pre-war(pre ww2) Nazi Germany the story is the man who I got it from his uncle was a World War II veteran and sent it back as a war trophy. There’s a few different models of this Knife. This is the most produced. I believe it’s a decorative piece like for parade or dress uniform. I’m open to trades. I don’t really have a use for it so let me know. I’m sure there’s a Collectr out there that knows more than I do about this thing.