I don't have any examples myself and am certainly no expert, but I've seen very similar blades (though perhaps somewhat more curved) on some Polish or Hungarian sabers. I've seen at least one exact match but that one looked a little suspect to me at the time (but what do I know?). Unfortunately I am not a well organized person and I seem to have lost the picture of it.
The picture below is not an exact match but the closest I could find with a quick google search and has the subscript: "Sabers of Hungarian-Polish style, about 1600. (National Museum, Cracow)".