Unknown Indonesian sword for comment; Sleeper!

[Conogre]

Actually, the Sumba kabeala appears to be different to my eye in that yours has a slight inward curve to the belly along the rear edge as it nears the hilt.
If you look in Von Zonneveld's "Traditional Weapons of the Indonesian Archipelago" you'll see a Elida from Flores with a much more similar blade, and on pages 135-139 there are several of the Timor group swords with figs. 573 and 575 listed as Tanimbar swords that have similar hilts as well.
While the extremely primitive heavily watered pamor would give a Japanese afficionado nightmares, I find it particularly attractive.
I also think that you're barking up the wrong tree looking for a particular "pamor" as in keris blades for rather than having a specific "magic enchantment" these tended to more along the lines of "cuts the head off very well" empowerment.
Here's an Opi from Weter Island (according to Stone, pg 476, fig. 602 ) with a pamor similar to yours that I was lucky enough to get from Artzi at "Oriental Arms" when he was having a particularly bad day, listed as "an old klewang".
I almost broke my keyboard firing off a purchase offer!! **grin** Mike