I think this keris is a Malay keris, so it could be a Malay village headman's keris. The Bugis have pistol-gripped kerises, while the Jawa Demam hilt is usually associated with Malay kerises (though Malay kerises have pistol-grips too).
When I first saw this keris, its Southern Malay-ness attracted me. It was very Malay Malay, if I may say that.