The Vista Dome

The back of this postcard has the following description:

The Burlington presents the VISTA DOME, an entirely new idea in train travel. In this new type car, 24 passengers are seated in the Vista Dome, a laminated, heat and ray-resisting glass penthouse, replacing a section of the roof and providing an unobstructed view in all directions. Modern air-conditioning affords complete comfort. Burlington is building a fleet of these cars for the enjoyment of its patrons.

The ad below is from Popular Mechanics of September 1945 (source: Wikipedia)