This large, spiral-bound phonebook was published in 1939 by the Union Pacific Women’s Travel Department. However, it seems to be aimed at young boys as much as their mothers, as it is filled with black-and-white pictures of steam locomotives, Diesels, and passenger & freight cars.
This book has no title or date other than dates on some of the photos, the most recent one being 1939. This is a photo, or possibly an artist’s drawing, of one of Union Pacific’s “steam-electric” locomotives, which were built by General Electric. Two of these went into service in April, 1939 and were so prone to breakdown that Union Pacific gave them back to GE in June. The photo dates the booklet to early 1939 or possibly late 1938.
Here is a General Electric postcard showing the unusual locomotive. After Union Pacific rejected the pair, GE tinkered with them and persuaded the New York Central and Great Northern to test them, but neither kept them or ordered more. Of course, after the war Union Pacific became famous for its General Electric gas turbines, which were a natural step forward from the steam-electrics.