Hello pvon, these knives were first offered many years ago by a german dealer whose items, especially engraved, etched and high end items, let´s say, mostly are avoided by serious, experienced and honest collectors. There is an intersting thread over thee at WAF about those knives. If I remember right in the thread there was prooved that these knives are postwar products.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.