The postcard features an image of the New York Central's "Empire State Express" train, pulled by engine no. 938. This train appeared on the Pan-American Exposition commemorative issue in 1901. The Pan-American Exposition took place in Buffalo, New York, from May 1 to November 1, 1901. The postcard also mentions that the inverted stamp on the postcard is a result of a printing error. This information is sourced from the National Museum of American History, Smithsonian Institution, in 1981.