The 15-cent Organized Labor commemorative stamp was issued in 1980. “The stamp honors the American labor movement, which is an integral part of the history of democracy and freedom in the United States,” according to the Smithsonian Institution.
source: https://www.si.edu/object/15c-organized-labor-single%3Anpm_1985.0021.2493
UA-Fayetteville Education Association 