Yes, another part of the mystery - I don't even know where to start on how to determine if that is real. This whole set appears to be some kind of gift. The plaque on the case says (in German) In Honor of 22 Enemy Airplane Victories.
I have about 40 pictures of the whole set if you want to get a better picture of the medals at this link.
https://imgur.com/a/LYqGP