I have a similar but absolutely modern Bugis hilt certainly made of Kerbau as I believe this too is (although mine is certainly black with hints of white-grey) while this appears to be brown . Also I have a couple of similar Bugis warangkas very similar. The blade may or may not be " Bugis" but since the Bugis culture is widespread in many areas could easily be borrowed from a different tradition. It somewhat reminds me of a Palembang blade that I have.
With hindsight, it is possible that it may be rhino.
http://www.vikingsword.com/vb/showthread.php?t=6162
One should be really looking at any trace of dotty structure. If it is...this may be bad news since out is not possible to legally trade this item in perpetuity and only a museum may be able to display it
I am curious to whom would be able in any western country of the world to offer rhino hilt?