Winchester Model 12 Heavy Duck, 12 ga. slide action shotgun.   Serial #1655658, mfg. 1958.   Excellent condition.  30” solid rib barrel has an excellent, shiny bore, 96% blue with crisp address markings.  3” magnum chamber, choked FULL.  Receiver and trigger guard have 90% blue with light edge wear.  Target grade forearm has excellent finish and checkering.  Stock has excellent smooth finish and checkering, Winchester solid rubber pad.  LOP is 13 ¾”.  Slide action works fine – an extremely nice example of one of the FIRST magnum waterfowlers!  C&R OK.