Tombak spearhead

[Rick]

Originally Posted by A. G. Maisey

Admitted, it is often very difficult to get a clear impression of details from a photograph, but from what I believe I can see in the photo, I do think this metuk is mechanically fitted, not integral.

Thanks Alan.
Let's posit then that this is a mechanically fitted metuk; what would be the reason for its not being an integral part of the tombak; is it solely for some mechanical advantage; or possibly for some esoteric reason like a stopper in a bottle meant to contain an isi or spirit that may have inhabited the weapon?
It certainly requires considerably more work to make and fit a metuk rather than to just thicken the base and shape the metuk integrally on the blade.