I think it is an old blade but not 500 years old. Maybe 30 to 50 years. Or it could be from this "historismus" of late 19th century. Mostly I see it like a bladesmith's game to make something it looks medieval.
It is too much for the fake market, they make them more simple and more rusty. It is also too little for the real thing, if ever was a thing like this in the real world.
A bladesmith who can do all this weird work on a blade can do a straight fuller, but it looks he does not care, dont you think?
