Poster has a black background with white text and black and white photograph. In the center is an image of prisoners behind barbed wire. Poster reads, "The Nazi's say they are going to celebrate Hitler's birthday in San Francisco. It better not happen here!/ Stop the Nazis! Mass Mobilization, Civic Center, Saturday, April 19, 11 a..m, Be there!/ April 19 committee Against Nazis." The lower area has a listing of sponsors.