Tom:
The Edenton bell Artillery reenactors have their own web site at www.geocities.com/edentonbellbattery which you probably know. This site describes the 6 pounder field gun they have as a modern day reproduction cannon machined in Rocky Mountain NC. It is based on your cannon at Vicksburg and this is why they call theirs "Miss Vicky". The gun mentioned as being on display in front of St. Paul's church is un known to me. It may be an original but ?

Ron