Very interesting dagger and a rare variation cross-guard. Only a handful of daggers bearing this particular pattern are known as far as I am aware and the others are all fitted to Voos marked early army daggers.
I have always leaned towards Klaas manufacture on 1st appearances and it is great to finally have one turn up maker marked to a company other than Voos.

Do you know if the scabbard has asterisks stamped onto the scabbard bands ( unique Klaas trait )?.
It is a very rare cross-guard and one that I would be happy to add to my collection.
There are a couple of members here who are also lucky enough to own this cross-guard and will appreciate seeing this piece.

welcome to the forum.