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The handle is completely inappropriate for the head, I'm certain it's a replacement.
Might be some hope of identification, though -- look on the underside of the poll (that's the 'hammer' opposite the edge) and see if there's a small number there. Right where the handle and head meet, on the handle side of the head.
The head seems too thick for what I'm thinking, but it's worth asking. The key to identification, in my opinion, is the unusual means of attachment.