Three Spear blades ... Zulu ?

[fernando]

Hello, i am needing some guidance.
I have just bought these, in a street fair.They look some old and reasonably cared of, though.
The ones with the large sockets have no traces from their hafts, but the fixing nails are still there, and looking original.
The one with the more fragile socket has the haft stump left inside. The material is wood and the fixing is done with three tiny studs. Maybe a modern arrangement, i don't know enough to judge.
Any coments on their provenance, age and classification would be much wellcome.
fernando