The Upper Steel Arch Bridge, also known as the Honeymoon Bridge or Falls View Bridge, is the subject of the 5-cent Pan American Issue stamp. The bridge was completed in 1898 and was the largest single-span steel bridge in the world. It crossed Niagara from the United States to Canada until late January 1938, when a massive ice storm raised the river and stacked so much ice against the bottom bridge supports that the entire structure collapsed.
The ultramarine and black stamp was the first five-cent denomination printed in more than one color. There would not be another multicolored five-cent stamp for another quarter century, and that would be the 5-cent Viking Ship stamp from the Norse-American Issue of 1925.
The 5-cent Pan American stamp typically paid the single-weight Universal Postal Union international rate. When used with other denominations, it fulfilled large weight and foreign destination rates. A total of 7,201,300 stamps were printed by the Bureau of Engraving and Printing.