If serial number data has been published, you can look it up.
Start by posting a question here with a detailed description with ALL markings- and we MAY be able to give you an estimate. Or take it to a gunsmith.
Old gun catalogs
Post the maker's name and serial number.
Try Blue Book of Gun Values
Old gun catalogs, on line auctions, gun shops, gun shows, libraries
Made sometime in the mid 1870's.
Blue Book of Gun Values
Old gun catalogs, auction sites, gun shop, gun show
18
How old do you have to be to sit in shot gun
Old catalogs and gun books would be the best place to find them
Try old gun catalogs
Want ad, gun shop, gun show, on line auction sites.