It would be helpful to see a picture of the whole sword, but the evidence so far suggests this is a parang latok. Van Zonneveld says that the hilts on these are almost always wooden, but I have an example that has a bone hilt too. Fran, yours is only the second one I have seen with a bone hilt, and the hilt mounted in this fashion.
Regards,
Ian.
P.S. I found
a thread where my example was discussed on the forum previously. There is some mention of a similar weapon used by the Land Dyaks called a
buko. Also discussed inn that thread were soe characteristics that help distinguish between a
parang latok (Sea Dyak) from
buko (Land Dyak). Hope this is helpful to thinking about the sword posted above.