Hi Henk,
that is the type of wire-work I have seen on a few African spears....the wire 'coiled' (spring like) around a central wire and then wrapped around the shaft. However, I am sorry I cannot remember the origins of those spears at the moment
...will do some 'digging' The very fine wire wrapped above is probably 'telephone' wire or coil windings from small electric motors. I do not think it very old ....my guess around mid 20th C.
Kind Regards David