Obviously a saber of sorts. But it looks fairly thin and too flimsy for use in battle. I would guess it was some kind of sword for a military dress uniform? But as I said, I am just guessing. Monty
It's a nice early 19th c shape, but what throws me is the Art Deco pommel, and the lack of marks. Also the decoration on the spine looks like poorly done acid etching... leading me to suspect it is a older wall hanger.
Is the wire on the handle just copper, or was it plated once upon a time?