As with anything that is not text book you need to have some faith that the piece is as it came from the factory, the etched makers mark on a Krebs doesn't concern me as much as the grip does, it's a strange one and it's a leap of faith that it's original pre 1945, the blade etch looks OK but personally I would need an on hands look before I would know if anything about this piece was from the period it is purported to be from, I would have to see how the clamshell badge is connected, I'm not sure how the badge has gained that much patina and the remainder of the dagger looks very new. Certainly for anybody to pay over $6K for it sight unseen would be brave and certainly would be a leap of faith that I personally wouldn't want to take.

Gary