Best source is the "Blue Book of Firearm Values" Sold at gun shops, and other pub sales outlets. also online
Look in your library for a copy of The Blue Book of Gun Values. You'll find information on hundreds of single shot guns.
Blue Book of Gun Values might have an answer.
Gun Broker, Guns America, Guns International
Blue Book of Gun Values
They don't. They are shot by PEOPLE that are using guns.
Try a periodical called "The Gun List" You can also reference the Blue Book of Gun Values which can be purchased on line at various retailers. For prices sold, try the gunbroker.com or
Old gun catalogs
You need to find some books by Joe Vorisek. They are hard to find, but "Shotgun Markings" is probably the one you want to identify the manufacturers of old trade-name guns.
Blue Book of Gun Values
Go to Browning's site, click on Support then date your firearm.
They made lefever shot guns starting around 1878 and ending in 1921.
BLue Book of Gun values