As nearly all is written and well decribed and pointed out in detail what is wrong (personally I am sure somebody is watching this thread to learn to avoid each mistake in the future) on this dagger, I can ad something (my "hobby-horse" in our collecting field):
The inscription (engraving).
Again a nice example of something wrong. But, hey, I have learned (thanks to this forum) that I could be wrong and the inscription could be right although it is wrong
!
Let us imagine the following might has happened: The NPEA-pupil ... who later seems to have become a teacher... (NPEA�s were looked at as elite education locations) or any near relative of him has brought the certain dagger to an engraver. "Please engrave me -NPEA Naumberg 1936- in the upper part of the grip" The engraver has answered: "Hey boy, we are here at Naumburg!" The pupil answered: "I am sure in 2006, when this one becomes a collectible those *********** collectors will not know the difference, nobody will care of the difference. It also will not matter anyway if you write New York or Nev Yorc on an item, they will not know, they will appreciate it, the will buy it and pay much money for it. So do what I want you to do!!! Write what I told you!!!"
So this totally period inscription
took place on this totally period item
Thanks to member(s) of this forum I have learned such things might have happened and I am very glad I could learn.