You have a double trigger w/extractors, Stevens 311A, with most likely full chokes (or Mod/Full) - Savage's plain vanilla/utility SxS shotgun, made under various brand names until about 1989.
Unless they've been replaced, the stocks should be a non-walnut hardwood - usually a blond Birch, with a walnut stain.
It was probably the most widely produced SxS ever made.
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