At Tim's request : here it is.
This spear is a currency spear used by the Mbole and/or Topoke-tribes in Congo. As you can see from the pics, it has no point. It is of no uses as a weapon. Could be used as a ceremonial piece.
Nevertheless, the forging on this spear blade is beautiful.
The wooden shaft is fairly simple, but some iron and copper rings are used to decorate it.
Total length : 1m58.
Here are some similar pieces from the book 'Waffen aus Zentral-Afrika) :
