This is the closest match I can find and is the "correct" sword although I do not understand much Spanish. Web search will show several companies making high end reproductions.
sable suboficial ejercito espanol
Like I mentioned earlier, the quality of this is not the best so at best it is a ceremonial sword. At worst a cheap reproduction that someone left it a damp area for an extended period of time.
I did find out what the end nut looks like so I can hopefully recreate one. Large round insert with a cap on it and the two small holes needed to tighten it. I did find one photo of an original and it did look the same except the marking and it was in better shape. Maybe it is legit.