Hmmm...I guess it was presumptive of me to not think of a possible ethnographic origin. It could indeed be African, but I still think this piece has some aging to it. I also was thinking about zinc, but being that it's use came later in the 19th, I dismissed it. Is there any test I could do to positively identify the alloy in the hilt? I still think it is tin or pewter, but not sure.
If it is African, I hope it's Algerian or Moroccan (Pirate!!

), but the piece looks more European/N American to me.-