The scabbard is an early German 98k, which isn't unusual in my experience. I feel it is more unusual to find them with the proper Polish scabbard. As far as the missing inspection marks, it has been my experience that this is not that uncommon on the WZ39. Although I have no knowledge as to why this happened with this particular model.
Jim
Here are two earlier models that I have
https://www.warrelics.eu/forum/bayon...z-28-a-415770/
Bookmarks