1971 21¢ USA and Jet
Issue Date: May 21, 1971
First City: Washington, D.C.
Quantity Issued: 49,815,000
Printed by: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved (Giori)
Color: Red, blue, and black
Issued as part of the postal rate increase, this stamp signaled the raising of the international airmail rate from 20¢ to 21¢ per one-half ounce to all parts of the globe except North and South America. It’s identical in design to its predecessor, except that the denomination was changed and the colors reversed.