Nice
https://www.rockislandauction.com/detail/67/768/stevens-j-arms-co-s-x-s-shotgun-12

The barrels are "English Damascus Twist", Damas Anglais Coupe', Gebrochener Englischer Damast, or Combination Damascus



'FB' was likely the Liege tube maker, but I can't ID

It does not appear to have a 'step' at the end of the chambers for brass shells, but please have a double gun specialist check the chambers and barrel wall thickness before use.

Who was 'Red'?