That's a lovely Borneo sword Charles!
Where the hell do you find all your stuff???
IMO it's from Sabah and it's called a Gayang.
Probably late 19th century, as it is definately old style, but seem to be preserved very well.
Are there any signs of restoration you're aware off (or know off)?
A very beautifull sword with just the right patina on it!
Congratulations with this great find!
Maurice