I've done some preliminary research and know, from its S/N 30022, that it was manufactured in August 1863.
The majority of the inspector's stamps are the letter "A", in a slightly Italic font.
It has the letter "S" to the Trigger Guard, Rammer and under the guard on the frame. It has "B" on the rear of the cylinder, a "G" on the left frame near the grip and an "R" on the left grip frame.
Looks lile the picture finally uploaded
I'm also adding a picture of the PL7 target I used for test firing at 25 yards (last Sunday). The shots circled in yellow were the "braced" shots with my hand resting on box and with me sitting - aim point was the bottom of the black in a "baloon hold". The following 10 shots were shot "free hand" (single handed with no support) - I was quite pleased with the results and the front cone needs to be made a bit narrower.
Can anyone help with any more date/historical info? thanks, George.