I believe the sword is just fine. I don't see any problems at all. I own an early Krebs and yours matches up quite well. Some maker's used the SS proof marks and some did not. If existing stocks of sword parts ran low, some sword makers would orders parts from other manufactures, so some may have the SS proofs, others may not. Not an issue, and I would have no problem owning this sword.
Thanks a lot Marcus
All original from top to bottom, including the eagle. A nice complete example.