Photo illustrating the observation area of the Pioneer Zephyr. Brochure says "A keen little solarium fitted with detached chairs occupies the glass-enclosed rear of the last car."
日期
No date is shown on the brochure. This would need to be circa 1934 as it would be the last year of the Chicago World's Fair and the year the Pioneer Zephyr made its debut. Since die-cut items have always been expensive to produce, it would seem to be correct in that it was distributed as a 1934 World's Fair handout. Don't think the railroad continued producing these after the Fair because of the expense involved, and that it would have been warranted to make a good showing at the fair.
The item has no copyright markings on it as can be seen in the links above.
United States Copyright Office page 2 "Visually Perceptible Copies The notice for visually perceptible copies should contain all three elements described below. They should appear together or in close proximity on the copies.
2 The year of first publication. If the work is a derivative work or a compilation incorporating previously published material, the year date of first publication of the derivative work or compilation is sufficient. Examples of derivative works are translations or dramatizations; an example of a compilation is an anthology. The year may be omitted when a pictorial, graphic, or sculptural work, with accompanying textual matter, if any, is reproduced in or on greeting cards, postcards, stationery, jewelry, dolls, toys, or useful articles.
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