The Silver Bear on the K-Line 21" car sets is an 18" car, just as Brain notes is the case with Santa Fe Super Chief sets as well.
The grand flaw, easily fixed, in the K-Line sets was the lack of a fifth dome car -- for a train which marketed itself as having five domes, at least in the golden years of passenger service. Easily fixed however, with the purchase on one additional dome-chair car and quick name plate change.
Thanks to Brian last year I gave up on the Atlas CZ, and began tracking down the 21" K-Line cars, best advise I'd gotten in a long time.
Given that these were offered in all three sizes by K-line, are seen on the secondary market fairly often, and based upon prices sited here are in line with this Frankintrain Lionel is calling the CZ, send them back, cancel future orders and come to the dark side.... you'll be glad you did.
