what kind of lance is this?

[fernando]

Please help.
For some time i see this lance ( spear ), but i wonder.
The seller, a country shop, whose opinion is that haft and head are not from the original combination, still wants a heavy price for the set.
But it could be that the collar is now mounted upsidown, giving the set an auckward look, like the haft being a poor arrangement to put up a more saleable object.
However the collar and the two rings, mounted in a different position, could maybe show that the rattan haft and head actually belong one to each other.
The blade, some 8 to 9 inch long, though with very smooth and accurate lines, both flat and edge lines, shows a few signs of activity, looking with attention.
There is a piece of wood in the mid section, filling the collar part.
Sorry the pictures are more in quantity than in quality ... rather a challenge
to take keen pictures, without a tripod or the like, being one handed .
Could anyone give a help at identifying this piece? Provenance, culture, genuinity, possible age?
Thanks a lot in advance
fernando