Origin of the Kalinga Axe

[VANDOO]

HERE IS AN INTERESTING DANCE AX FROM CAMEROON AFRICA. IT IS SAID TO BE USED BY THE BANA,KAPSIKI, FALI AND KIRDI TRIBES FOR DANCES AND CEREMONY. THIS EXAMPLE IS 15 X 7.5 IN. AND HAS AN ALUMINUM BLADE. HOW FAR BACK THIS FORM OF AX GOES.
SO DID THE FORM DEVELOP IN AFRICA OR IN THE PHILIPPINES AND DID IT DEVELOP FROM A TOOL, A CEREMONIAL OBJECT OR WAS IT ORIGINALLY A WEAPON, THE JURY IS STILL OUT.