Dagger looks to be an original NPEA stufent dagger issued to the school at Köslin (sp?). Nickle silver crossguards have a nice patina & go with the early Bergsmüller mark.
As noted, the frog looks like a dress bayonet frog jammed into place.
Condition is the key factor here, & it's not in great shape. The scabbard dent toward the bottom will be near impossible to remove. The question is does the asking price take into account the condition.
