Philippine spears for ID
 

When I acquired these spears, my first impression was that they were "moro" or that they were from Mindanao (because of the brasswork). However, I am wary to make a fast conclusion (because brasswork is not unique to Mindanao only).

Can anyone help ID these 3 spears?

They look like Lumad pieces but I have never seen blade shapes like these on PI Lumad pieces before....

Here are three more similar spears. One has a black ring close to the ferrule which is apparently carabao horn. I still have not pinned down with any definitiveness the origins of these spears to Mindanao, Philippines.

Here is a pic of a spearhead specimen at the Burke Museum of Natural History and Culture. It is identified as a luzon spear ca. 1915. That may or may not be a misidentification. Sorry for the low res-image.

THE SPEAR AT THE TOP OF THE PICTURE OF 3 SPEARS IS THE CLOSEST TO A NORMAL WAR SPEAR FROM LUZON. THE OTHERS APPEAR TO HAVE BEEN MADE USING MORE REFINED FORGEING TECKNIQUES SO PERHAPS THEY WERE BROUGHT IN FROM SOMEWHERE ELSE AS TRADE ITEMS??.
THE SHAFT ON THE WAR SPEARS OF THIS FORM THAT I HAVE PERSONALLY SEEN HAVE A BLADE THAT SOMETIMES HAS A HOLE IN THE TANG. THE WOODEN SHAFT IS USUALLY ENLARGED WITH A METAL FERULE WHERE THE TANG GOES INTO THE SHAFT. THESE SPEARS HAVE A VARIATION ON THE SHAPE OF THE POINT AND ON THE FORM OF THE SHAFT. THEY ALL LOOK LIKE HARPOON POINTS SO IT MAKES ONE WONDER IF THE SPEAR FORM EVOLVED FROM THE HARPOON OR THE OTHER WAY AROUND :shrug:
KNOWING WHEN AND HOW STEEL FIRST CAME TO THE PHILIPPINES COULD SHEAD SOME LIGHT ON MY LAST QUESTION.