Now there is another a little bit mysterious Bali-Sulawesi specimen, with similar handle -
http://www.vikingsword.com/vb/showthread.php?p=187966
Blade looks Balinese, sheath - Sulawesi. Handle isn't really faceted, but close.
Now has somebody a "Matana knife" in he's collection?
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What leads me to think the handle (of our "Mardhik") isn't original is the way blade is mounted to it - at the very upper part; the handle looks to big.
Or has somebody seen such handles on Bali? That would make things easier.