I personally have bought and owned 2 Eickhorn army daggers with Generic A crossguard. And both came from Veterans. In fact, I started a thread regarding this topic many years ago here on GDC.
It would seem that there was a specific period where Eickhorn didn't have stock of their own crossguard and I'm wondering if it wasn't in that period where their type 2 crossguard was used as that seems to be the most rare of the Eickhorn crossguards if I'm not mistaken? Or was it the type 3?

Even the Gods are helpless against stupidity!