It is T'boli. The T'bolo make all there handles and bells out of brass using lost wax method. The Bagobo do not make this same type of small bell. Rhysmichael is right in that both can have scabbard ends like this. If you etch the blade you may get a pattern in it. It is pretty close to complete. A nice piece.
By the way - the T'boli piece that is in the link is mine that I loaned to the exhibit.
