Anyone knows what this is ... please ?

[fernando]

Thank you Ian.
Yes, a cute little thing indeed. I first thought it could not be a weapon due to lack of robustness, as it looked, handle and all, but i see now that the blade feels quite strong.
I doubt i will never know its origin, or even provenance. I bought it over here in a not so close street fair, one i don't often go. I will take it as Portuguese by adoption.