The listing, used 4 cent SEATO stamp has ended.
The used and cancelled 4-cent SEATO (Southeast Asia Treaty Organization) stamp was issued on May 31, 1960, in Washington, DC. The central design features the emblem of the (SEATO) Conference in Washington, DC, May 31-June 3. SEATO was a regional-defense organization that came into force in 1955, to protect the region from communism. It was disbanded in 1977.