Mercury was the name used by the New York Central Railroad for a family of daytime streamliner passenger trains operating between midwestern cities. The Mercury train sets were designed by the noted industrial designer Henry Dreyfuss, and are considered a prime example of Art Deco design. The success of the Mercury led to Dreyfuss getting the commission for the 1938 redesign of the NYC's flagship, the 20th Century Limited, perhaps the most famous train in America.
The first Mercury, operating on a daily roundtrip between Cleveland and Detroit, was introduced on July 13, 1936. The Chicago Mercury, between Chicago and Detroit, and the Cincinnati Mercury, between Cincinnati and Detroit, followed. The Mercurys lasted until the 1950s, with the final survivor, the original Cleveland Mercury, making its last run on July 11, 1959.
I also like the old school workmen hanging out in their overalls. Overalls - the sign of skilled workmen which you never see anyone wear anymore.