I just was given a 1970s C.V.A. napoleon cannon and was wanting to know what they are worth. I have fired it about three times with just toilet paper wading and it is loud! I measured the bore and it is 5/8 roughly which I think translates to .62 caliber. I had to clean off some surface rust but it cleaned up great. I have looked on line but the closest thing I can find is a Traditions version that is.69 caliber I believe my carriage is Oak the barrel says Spain in the middle. I would be thank full for any information on this cannon.