Ice diving on Sat 1-9-10

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Google not working for you?  :

It's an ice chipper. I don't know why they call them Spud Bars. Think of a pipe with a large chisel point

John, look what I found in Wiki. This dates your find!
Spud Bar: Early ice spuds (before about 1925) often had wooden handles and a steel head fixed with a tang and collar or socket, like a carpenters chisel.