Stevens Top Break, 12 ga. single shot shotgun.  Serial #NSN.  Good condition.  2 1/2" chamber, fixed MOD choke.  30" plain barrel has a good bore that may clean up better with some effort.  80%+ blue finish on the barrel with peppering.  Some case coloring left of the receiver with some surface grime and age.  Wood checkered forearm and stock are in good shape with age and impressions in the wood.  Stevens marked black hard rubber butt plate.13 3/4" LOP.  C&R OK.