John, We started with a gunnade, I suppose we can continue with a bronze gunnade. Looks like a nice piece; wish we knew something about it. I just recieved Where Iron Runs Like Water, A New History of Carron Iron Works 1759-1982 by Brian Watters, thanks to that tip by Bob Smith on this thread. Looks like an interesting story, we will share some of it when we can.
Boom J. I wish we had total recall on the workings of this cannon, but we don't. The line behind the middle reinforce looks to us like the edge of the under-trunnion ring which is held in place by a threaded reinforce band. I believe this one is a muzzle-stuffer, but could be wrong on that. This gun was for sale at $2,500.00 in the past on the BNA site, so it may be available yet, we really do not know.
Regards,
Tracy and Mike