There's a whole shelf of books on firearms in your library. Or you may find information on www.savagearms.com
The Stevens 311 is a double barrel shotgun.
Mossberg or Savage/Stevens? Any particular model? email@example.com
there is a model 311a double barrel shotgun made by Stevens/savage but have not heard of just an 11a. I have a 20ga 311a given to me by my grandpa and he said it was made in the fifties. You can go to Google and type in Stevens model 311 and will pull up information on this shotgun.AnswerRemington made a model 11a but it was not a double barrel it was a semiauto.
you may find some info at the savage arms website.This was the maker of your shotgun,savage/stevens.
the value of a 1948 Stevens double barrel shotgun 16 gauge. Hammerless.
The model number is stamped on the right side of the receiver on many Stevens products.
Yellow pages category = GUNSMITHS.
gun-parts.com has them...but for 12 ga only