BAYONET, WWII, German, Gebr. Hartkopf, Solingen

This bayonet belonged to my father-in-law who was in Europe during WWII and we think brought it back then. I'm not a dealer and no nothing at all about this sort of thing. If you have any more questions or want more photos I'll be happy to do what I can. The whole bayonet is 15 1/4" long from the tip of the blade to end of the handle. At the base of the blade, one side says Gebr. Hartkopf Solingen and the other side has no marks. The blade is pretty dirty and I don't think any attempt was ever made to clean it. There are no identifying marks on the scabbard. There is also a leather "frog".
I will ship within a day or two by Priority Mail and will add insurance according to the purchase price.
Sorry - but I will not ship internationally
Thanks for looking!