Very interesting spear...Probably from the northern part of Africa - but would Arabian origin be a big nonsense ? (what about heavier kind of javelin with "armour piercing" head ?)
For comparision I enclose some parts of spears from Africa south of Sahara which are a little bit uggestive of this spear:
The iron pointed shoe (or maybe spearhead ?) of square cross-section was bought separately in Addis Ababa (two pictures).
Second from the left on the group photo is thick spearhead of similar shape - allegedly from Chad, but it was bought in Nigeria. 5th from the left, the slender one with two strange square segments, is Shewa Arab spearhead from North-Eastern Nigeria/Kanuri region (if we can believe the vendor...) - .
(Small remark concerning the wiring: There are cases of barrels of long guns held to the stock with very thin iron wire instead of classical cappucines in North Africa - just that the wire was for disposal ...
