This is an American Flyer Trains Boxed Set #20445 Northern Pacific North Coast Limited that was manufactured in 1958 only.  This is a very rare 5-Digit premium set that comes with the set box, all 5 rolling stock boxes, and of course the 21551 PA unit, 24843 combination car, 24846 passenger car, 24849 vista dome car, and the 24853 observation car.  Its all in very nice condition.  Its all there and everything works.  The 21551 PA unit runs very strong, smooth and fast in forward and reverse and the 2 position reverse unit works every time.  The headlight works.  This is the rarest version with the metal steps.  All of the knuckle couplers work great.  This is an awesome set.  But, I am not qualified to judge the grade nor the condition of this set.  So please see all of the pictures and ask any questions before bidding to judge for yourself.  I will answer promptly.  Accordingly, I am listing this set in "AS-IS" condition.  I will only ship to the lower 48 states.  Thank you for your interest and good luck.