I need some information on a vintage Henckels Zwilling folding knife.
I was already told that this particular knife should have been produced in the 1930´s or 1940´s...correct???
The blades are marked with "DRGM", "FRIGODUR" (I guess that means ice hardened), "NICHT ROSTEND" (i.e. stainless) and of course the twins symbol (see pics).
"DRGM" means "Deutsches Reichs-Gebrauchsmuster" (i.e. kinda patent pending) this abbreviation can only be used until 1945, because then the WW II and the German "Reich" was over...thanks to your vets.
A friend of mine wants me to throw it in the bay for him but I already have an offer of 100 bucks...ISN´T IT WORTH A LITTLE BIT MORE THAN THAT?
Some pics:



Thank you very much in advance for any further information.