The postwar production Kriegsmarine daggers are well known and documented (check out Tom Whitmann's Naval book for this): the 1 screw scabbards, the E&F Hörsters, the late marked Clemen & Jung, ...etc. So it is certain that some factories continued their production after WWII ended, the WKC firm however was not one of them.
Also, those who know something about Kriegsmarine daggers, will have observed that this is not a wartime production dagger, but most likely a 1938-39 produced dagger, so the theory of continued wartime production is not an option: the dagger would be completely different.
But of course, you are free to think (or speculate about) whatever you want.
Best regards,
Herman
Last edited by Herman V. (aka Herr Mann); 11/14/202105:29 PM.