A classic ethnographic piece Chregu!
I'm not sure what you'd like to know about these, but as always I try to find out about the history around the weapon. Clearly it is a modern weapon, but the nomadic tribal Afar (Danakil) people who use these knives which are termed 'gile' are pastoral and herd cattle as well as goats and sheep.
They inhabit the regions in Ethiopia, Eritrea and Somalia bit most known for the Ethiopian region known as the Danakil Depression, a desert known often as the 'cruelest place on earth' for its dramatic and harsh temperatures.
From most of what little is written on these, the blades are typically from car or truck springs and metal files. The men of the tribes of these people are well known for martial prowess, however these knives are utilitarian as well and this weapon seems used so unlikely a 'tourist' item, which is I think too often assigned to modern items still used or worn by many ethnic groups in present times.
"African Arms & Armour" C.Spring, British Museum, 1993, pp.103-105
attached: Afar nomad and in pink, the Afar regions of Ethiopia
Hope this will be of some help
All the best,
Jim