Is this an Authentic trench knife or a reproduction?

[Wagriff]

These are almost always seen on a Solingen marked blade,so,absolutely the design is German, I would think. But, I very much find it hard to accept that it is on a military issue knife. I've seen this same exact design on narrow double edge dagger type blades as well as the boot knife style with the false edge. I have never seen, however, the weird Iron Cross on one before. If anything, that makes it all the more suspicious.

[rra227]

Looks like my knife. It is Siegfried with his sword Balmuna fighting the dragon Fafnir. I got mine as a walk in to the store(Army/Navy store). It was for sale. I gave $35 for it. Yours is the 2nd. I saw. Rich A. in Pa.