Vintage 1968 Poor People's Campaign Pinback Button Martin Luther King Jr. MLK Show your support for the Poor People's Campaign with this vintage 1968 pinback button featuring Martin Luther King Jr. Perfect for collectors and fans of political memorabilia, this button is a must-have for those interested in the history of the United States and the fight for equality. Made in the United States, this button is a timeless piece that represents the struggle for social justice. Celebrate the legacy of MLK and the Poor People's Campaign with this iconic pinback button. Very minimal wear and measures 2 1/8". Union made by NG Slater Corp NYC.