Trisula of unknown origin

[VVV]

It's not a Keris but I think it's Keris related so that's why I choose to post it here instead of the other part of the forum.

I have tried really hard to find the origin of this Trisula spear.
I have discussed it with several people experienced in Tombak but so far I have only got indications, but no definitive opinion, of its origin.

Hopefully someone here recognise something on the parts of this spear to give me a clue on where to search further?
Maybe some of the motifs or other small details that you have seen on other weapons from a specific area?

For earlier opinions and more pictures:

http://www.kampungnet.com.sg/modules...view_album.php

Michael