Winchester Model 12 Trap, 12 ga. slide action shotgun.  Serial #1968723, mfg. 1970.  30” three-pin vent rib barrel has shiny bore, near 100% blue.  2 ¾” chamber, choked FULL.  Receiver and trigger guard have near 100% blue finish.  Patented “Hydro-Coil” stock and forearm have near 100% finish.  Spring action not working.  Correct solid black rubber recoil pad.  Slide action works fine.  An outstanding M12 trap gun with the rarely seen Hydro-Coil stock!  Great collector M12!