Dear Friend,
Here's the link to James D. Julia’s illustrated online catalog which includes the largest collection of antique cannons ever offered for sale.
http://jamesdjulia.com/auction/369-october-2014-firearms-auction/?session=1

The cannons start with lot 1384, about 4/5 of the way down the page, and include over 25 tons of full-sized original, working antique cannons, as well as many fine patent and inventors' cannon models. You can bid by internet, phone, or leave a written bid if you can't attend the October 7, 2014 live auction in Fairfield, Maine.
Please forward this to everyone you think may be interested, and put it on social media, etc.
Thanks!
John Morris