Hi Tim and Martin

,
thanks for the replies. Tim you've some very nice examples there

. I agree that the craftsmanship involved in the manufacture of these spearheads rival many a sword blade (albeit an 'untempered' one).
According to Spring, a number of this type of spear are made by Bantu blacksmiths for the Masai....I get the impression that the better quality ones are made by them.
There is information regarding the various warrior groups 'classification' via their shield's markings/colours, and although mentioned, spears are also...but with no descriptions/pictures of the markings.
There is evidence that the original meanings of the various markings is now lost amongst 'modern' Masai .....and that, today , coloured plastic bands are now used.
The suggestion here, is that, marked spear butts are likely older. And if correct, the spear would be more likely to have been used in a Lion hunt. Unexpectedly, I found a reference to the Long bladed Masai spear in Robert Wilkinson-Latham's "Swords"....
".....Spears with long tapering heads similar to a sword blade, short shafts and long ferrule were the weapons of the Masai and seem to be the most effective of spears...."
Kind Regards David
Apparently slavers travelling through Masai territory would trade iron and copper wire, beads etc for 'safe passage'. I have not found any reference to iron rods traded (but would be a better 'raw' material for the blacksmiths).