JC Higgins Model 66, 12 ga. semi auto shotgun.  Serial #NSN.  Good condition.  Was a Sears Roebuck shotgun.  Likely chambered in 2 3/4", but not marked externally.  24" barrel has a very good bore, Deluxe Poly-Choke lets you change the choke to five different settings.  85% blue finish with some finish wear and light spotting to the receiver.  Finish is thinning somewhat on top of the barrel.  Wood checkered stock is good with some field wear.  JC Higgins marked plastic butt plate.  Well made and many years of shooting left in this old girl.  C&R OK.