Old catalogs, old gun books.
Check the on line auction sites to see what they are bringing.
i am not 100 percent sure but i think it would be found on the barrel.
the value of a 1948 Stevens double barrel shotgun 16 gauge. Hammerless.
it is a Stevens, parts are interchangeable...
The Stevens 311 is a double barrel shotgun.
You might find one at a gun shop, gun show or at e-gunparts.com
I would check at Numrich Gun parts corp.They may be found on the web.
Best left to a professional. Find a gunsmith
A replacement barrel for a J. Stevens Arms C20-A shotgun can be found at a local gun/firearms store. If the replacement barrel is not available on site, ask if the store can order it for you.
Try e-gunparts.com, Shotgun News, Gun List, do a web search on "shotgun stocks".
I have this model gun however i know very little about it. EBAY e-gunparts.com is an awesome parts site
Try Numrich Arms