Hi Bill,
I found this text in the catalogue 'Dodelijk mooi-Beauté fatale' (deadly beauty) :
"The
liganda, manufactured by the Hanga and the Olombo, is an enormous spear point, measuring upto 1m60. It was used as currency in Lomani.
This object was used during transactions concerning marriage or when a new cano was bought.
The Topoke have two sizes : the bigger model is called
doa and the smaller one is called
dihunga (with a value of 1/3 of the doa). A slave was worth 30 doa"
You found a very nice cuurency piece, coming from the Congo.