I posted a query on this gun earlier but without pictures. I'm trying to collect as much info as possible on this gun before I turn it over to my son. It belonged to my gr grandfather so it has sentimental value even though it is mostly a piece of junk, I suppose. Broken stock, missing hammers and nipples, rusty. Certainly never to be fired again but I'm hoping I can get it in good enough shape for a wall hanger. I believe the markings on the barrel make it of English origin, probably Isaac Hollis and sons. Please take a look for yourself. The proof marks appear to be of Birmingham origin, I think, at least the barrels. The locks bear the name A P Gemmer and I don't know if he is related to the famous J P Gemmer. Any info you can provide regarding any aspect of this gun will be greatly appreciated. Follow this link to a Dropbox page which contains 10 images of various parts of the gun.

https://www.dropbox.com/sh/ppw8uhgmehctvjk/AABVIy6lcsy3v8jpciXiIgbGa?dl=0

Thanks for your help! You guys are great.
Paul Robinson