I bought one like this in Maine many years ago. It isn't really a fake sine there was never a real knife like this in service in Nazi Germany. Rather it is correctly termed a "fantasy" piece. The one I have has a blade marked Eikhorn which is a legit maker who made blades for the Nazi regime. That is sorta what fooled me when i bought the damn thing. It was "correct enough" plus "NAZI". It is the only Nazi thing I ever bought and since I find collecting that stuff distasteful it is appropriate that I got screwed. It was $60 as I recall. Still have it. A reminder.
Here is a faked piece: This is a Mauser m.1910 .25acp pistol. Serial is good, that triangle/circle thing is good. The eagle marks are crap. Why? .25 pistols were not part of the nazi armamentarium so they were never inspected for military use. Ergo the marks are fake. Pistol, unmarked, would have been worth $300. The guy is trying for $800. Pistol is good, marks are fake so the whole thing, as presented, is fake. BTW, the stamps can be bought on ebay.
I recall teaching my kids this as I dragged them thru antique stores and flea markets. I collect prints. Not the "Art prints" that Abdul "collects" of young men in suggistive poses but older stuff. A real print will have a plate mark, viz.
Silk screens and so on are printed but not really prints and do not have such a mark. That may be too fine a point. Anyway, you see examples of old maps regularly. Stuff like this
Often a plate mark is missing. And if virtually any pre 1600 map is priced less than $600 or so smile and walk away. If it is presented as real then it is fake. A reproduction is just that. I don't think I've ever seen a bad print that you could't tell pretty easily but I think that one could do a fake that would pretty easily fool a sophisticated amateur like me. Point is that it would be expensive to do and you don't buy expensive stuff without an iron clad guarantee of authenticity, nor from people that look like Shemp selling out of their car trunk.
I never touch jap stuff since it is the realm of fakers and I know shit about it. Similarly, Nazi stuff has been faked since the first GI bought Hermann Goering's gold plated Luger with real Nazi stamps all over it. Factories in Germany kept turning out the Nazi marked crap they made during the war till long after the war. Pieces that were awaiting assembly at war's end were assembled post war. Are these fakes? Welllllll ... they are not "of the period" so if they are represented as "Nazi" I'd call them fake, others may not. I understand that a lot of stuff is being produced in central europe now. Poland is, evidentially, a big source. If something is marked "Nazi" walk away. A friend who has been dealing in Nazi material for 30-40 years won't touch medals any longer. The fakes are just too good and he can't tell.
Here is a good one, a "Hitler Youth Knife"
And in virtually mint condition!!!!!!
Lets see if you have been paying attention ...
I'll let you have it for $300, what do you say?