Where does this blade come from?

[A. G. Maisey]

I think I'm on the same page as Jean with this keris.

If I had it in my hand, and if it was in stain, I might be able to put a reasonably accurate age on it, but it deviates quite a bit from the norm and I cannot read the material when it is out of stain & in a photo.

Best I could offer would be probably pre-1850.