Re the second one, I don't think that barrel band is original to the gun. I'm suspecting that the gun had a longer barrel, and that for whatever reason (damage, desire) it was cut down and that barrel band fashioned.
Another clue that the barrel band is a later add on is the stock under the barrel. It was never refinished, and it's oxidized, raw wood. It likely originally came to a visually pleasing taper under the barrel ending with a brass cap as it does on the first one.
It may well have been done when the gun was converted from flint to percussion as you are absolutely correct that it was a conversion.
My guess is that the barrel and percussion bolster are both replacements. Often in conversions the original flintlock barrel would be modified, but that one seems to have been purpose made as a percussion barrel.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.
Last edited by Mike Irwin; August 23, 2013 at 07:53 AM.