Michael,
I don't have any other reference pictures. Sorry! And for Kai, it was just my first thought at the first picture together with Freddy's remark that it was brought in with a keris. So that was my throw for a beladau. It has a bit the look of a jambiya like dagger and varying forms are not uncommon. Besides that I have seen other surprising hiltforms from the archipello.
The last picture of the hilt however looks like those african decorations we often see.
But I think Tim or the other Africa experts are able to judge that better.
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