My apologies Manuel Luis!! Reading too many posts at once and lost track as I was posting, thank you for your courtesy in noting my 'fox paws'
Chevalier, really interesting examples, but are these marked in the blade decoration with the names you note, American Eagle, Spies, Ketland?
As mentioned, Ketland was a commercial supplier so it is anyones guess how the terms might be interpolated. Mowbray wrote the book on American Eagle Head Swords so perhaps if anyone has a copy of that.