I have a similar spear in my collection. A knowledgeable person told me that it was from the Ngbandi-tribe in Congo.
The spearblade on my piece differs a bit as it has a more slender 'neck'. The spearpoint measures about 81 cm, of which the actual spearblade is 30 cm.
The diamond shaped butt-end has a length of 20 cm.
In total this spear measures 173 cm.
It's the spear on the far left.
