A number of sources abound...I went straight to this one at
https://en.wikipedia.org/wiki/Throwing_knife depicting a display...A selection of African throwing knives in the British Museum....in room 25 pictured below.
See also
http://www.vub.ac.be/BIBLIO/nieuwenh...currencies.htm
Go to http://www.ezakwantu.com/Throwing%20...l%20Africa.jpg where there is a map showing the region such weapons were used in...and there is a peculiar shape similar to yours(the only 5 blade on the map) at 31degrees East ....17degrees North. Just above the last letter N of Sudan
Just West from Khartoum !!
In conclusion I am not sure about your weapons credentials...Is it a throwing knife or a ceremonial item? I have seen many 1, 2 and 3 bladed weapons and several 4 bladed weapons but not a 5 blade...except above.
I have never seen a dotted blade of this type although it is the style of Talismanic dots seen on other items and artefacts ...geometric shapes and devils...therefor it could be genuine.
Having said that it is not exactly my field so I step aside to allow in anyone who can throw light on this blade style. As a further assist here is an alphabetical list of all things African in this regard; I have checked all the iron currency items and throwing knives and can find no parallel ...
http://www.hamillgallery.com/SITE/Li...sbyObject.html
Finally I place this web page for information on currency iron work... Hoe Currency
http://africa.si.edu/exhibits/site/blades.htm
Regards,
Ibrahiim al Balooshi.