The distinction between practical and ritual/ceremonial is blurred with most Ethnographic weapons. Azande 'kpinga' were used as weapons. The iron was good so if you lost one, no doubt someone else would benefit from your bad luck. They were also traded and those made from copper were almost exclusively used as currency.
Spring devotes an entire chapter to these unusual weapons in all their bewildering complexity. This plate from Spring's book shows some of the forms and early attempts by Europeans to 'Classify' the shapes. I cannot recommend this book too highly. A must for you Darkest Africa devotees out there...
