UBB.threads Forums Edged Weapons SA & NSKK Dagger Forum Question about marking GAU.

Hello fellow by definition the early SA Dagger usually have their marking GAU in the back of your bottom trim, my question is, was there some early SA Dagger that were not marked on his garrisons? My question is because I saw this early SA Dagger with manufacturing "Hugo K�ller, Solingen" without this tagging GAU and I wonder if that combination is also correct, what you think?