Mexican (?) Dagger for Identification?

[knife7knut]

Originally Posted by Ian

Hi Mike:

These are Brazilian in origin, I believe. You will find an example in Levine, listed as a faca da ponta, if I recall correctly.

I have a couple of these. Is the blade sharpened on this one? Mine are mostly non-functional and probably made for the tourist trade.

Pretty knife and well put together.

Ian.

Thank you Ian:
I have 3 of them as well and two of the pieces have an unusual cone-shape that is integral with the blade right where it joins the handle.The smaller one for some reason does not.
I also notice that the rings are of a different color on all the examples. Do you know if there is some significance to the coloring?
Thanks anyway for the ID.I am enclosing a couple of pictures.
Cheers
Ray