Well, as I understand it eickhorn and other manufacturers made many different swords etc for export- and many South American nations had German made export pieces swords bayonets daggers. Brazil Argentina many others. Honestly I'm a total novice at blade identification but for some reason my first guess was P for Paraguay... No doubt Paraguay has a German connection, big time! And the one example in this article
I found about South American blades looks similar (the Paraguay one). Again, it was more of a question than a guess... So again, could it be South American?
South American swords