The Post Office Department issued the 10-cent stamp of the Panama-Pacific Exposition Issue in three varieties. The first, issued in 1913, has perforations 12 and a orange yellow color; the second, also perf 12, is orange rather than the orange yellow color; the third, issued in 1914, has perforations 10 with the orange color.
The fourth and final denomination of the Panama-Pacific Exposition Issue portrays a Spanish expedition party on the shores of the San Francisco Bay.
The 10-cent stamp paid the double weight Universal Postal Union international rate or the domestic registered mail fee. It was also commonly used with other denominations to fulfill large weight and foreign destination rates. An estimated 17 million 10-cent stamps were printed by the Bureau of Engraving and Printing.