I recently came Into ownership of four new firearms.(Inherited) #1 is a 410 sxs Fulton and as far as I can tell there was no serial number however I did not break it down? #2 Is a 12 ga Remington pump 31 with what I believe has what is referred to as a polychoke.? #3 Is a 20 gauge Remington pump 31L with a polychoke? #4 Is a .22 speedmaster Remington Model #552? Just curious about the guns and the history.