I Purchased this shot gun from a gun shop about a 1.5 years ago. It was on consignment, so the shop owner couldn't tell me much about it. I'm having trouble finding information of the manufacturer, and would like some input on where to look, or maybe some personal knowledge on the value and manufacturing date of this shotgun. It is a Double barrel pin-fire shot gun, with numerous markings "Isaac Hollis and sons." I have not found any serial number. The only information I have is that Pin-fire shot guns were no longer manufactured after 1896 ( or something like that. Any help would be greatly appreciated.