Hi Martin,
I'm really grateful you are sharing your thoughts. I am no expert in spears, so I can easily be wrong.
For 3 I thought this was more or less the classic Madagascar design? I saw many spears before with this attribution - but you are right that the silver collar is very unusual.
For 1 I am very interested to see any related photos. I can find nothing in this style really in my few books.

I think for copyright it will be ok - it is only for discussion and should be covered by "fair use".
Richard,
Thanks for the encouraging words. Spears are a new area for me and I am trying to learn as much as I can.