Thank you for your reply. The steel lever to allow the shot into the silver piece is signed James Dixon & Sons. It is also dated Nov. 26, 1857. I know James Dixon & Sons has made gun equipment for many years as I have had some other early Black Powder pieces by them (wood and brass).

I could not find this mark for James Dixon and thought maybe because it is an earlier mark. There is no trace of plating anywhere, even under a 10X jewelers loupe. I have certainly had quite a few plated pieces as well as sterling but not by James Dixon & Sons. This one has me stumped! There are a few deep nics where the end went into the gun barrel and even there no sign of plating. Hopefully someone will see this mark and know it. Thank you, Tim