Help Identify - Indonesia?

[DaveA]

Originally Posted by kai

Hello Dave,

This might be a woodworkers tool (artisanal carving knife, possibly doubling as an EDC).

As suggested, it possibly may be Malay (including the coastal communities of Sumatra and neighbouring islands).

I'm also inclined to believe the hilt is from kerbau horn.

Regards,
Kai

After cleaning and looking more closely at this an other examples, I now agree it is horn. The greenish color I have not seen in water buffalo horn before, nor is this example as dark black as others. I suppose this is just natural variation.