Spear?

[Akanthus]

Normally the rectangular part of boarfeathers is part of the shaft and tied to it.It is mostly not a part of the blade .It should prevent that the blade penetrating too deep in the wildboars body.If it's old, for me the spear is a simple weapon for use in a revolt ,for example in the peasant wars.At that time the bkacksmithes created simple but effective weapons often by changing agricultural tools.Pehaps it is a later collector weapon ,that should remember of those times