Thanks for replies so far. The owner has not given me dimensions but I have asked for these and will post when I get them. My estimate would be around 12" to 18" (300 to 450mm), and YES he says it looks to have been forged from a bolt or some similar item. He was also told by the person who sold it to him that it could have come from the Phillippines and could be a tourist item.
Just looking for some closure on this. In my opinion an interesting piece in any case.