The war was over and the streamlined Empire Builder was still a year away, but Great Northern was advertising its trains to Glacier National Park with this orange-and-blue brochure. While the orange foreshadows GN streamlined trains, it results in rather ghastly faces of people apparently watching a sunset in Glacier Park.
Using orange, blue, and black ink, this brochure is just one step away from four-color printing. GN began using four-color photos in its magazine ads as early as 1940, as shown in the example below. But perhaps the GN marketing department felt that the economics of printing had not yet advanced enough to make the four-color process feasible for large brochures.