Freddy what a nice spear rather like the Tuareg all metal spear.
Saying a people used just one or two types of spear is a trifle bombastic. This is often said about the Zulu. Spears vary in function and a spear blade unless very distinctive, is a rather mature design making attribution just on an ordinary shape without provenance or documented evidence a little tricky. A book reviewing pan African spear types would be a great publication also a Herculean task and most probably rather expensive.
Picture Hutchinson & co London 1918. Okay the caption says Kikuyu but culturally not dissimilar to the Massai who I believe used the same initiation shields symbolising emergence. Just thought the picture was relevent to the thread. Tim