Nice piece Sajen. One site has a similar Bugis piece with ivory hilt and gold in a similar style. They called it a Bugis sultan's keris.
Back to the Bugis chieftain's keris, would this be an example? It is sold from Freebooter's site:
http://www.swordsantiqueweapons.com/s125_full.html
(someone beat me to it
)