Thanks for all of the information guys! I would still love to figure where it originated, but I think I have hit a dead end.
To your request Carlton, I have taken some new pics and uploaded them here:
http://www.collectorfocus.com/collec.../miscellaneous. You'll notice that one of them shows part of an original label that is on the bottom as well.
As for the size of the ball, it is roughly 5.5 - 5.75 inches wide (18 inches around). I guess my next move will be getting some silver wipes to clean it up. After that...who knows? My wife has taken a liking to it, so maybe it is time to collect trophies!