Extremely rare 1968 NAACP handbill. A screenshot (actually two screenshots so all information is captured for reference) appears in photos above.
The Swann's description has great information and reads as follows (this is a cut-and-paste). Handbill, 5½ x 4 inches; minimal war. Footnote: A clever NAACP voter registration appeal. If logic does not work, a cute dog is a good fallback. The Oakland Post photo archive at the African American Museum & Library in Oakland holds a copy of the original photograph of the boy and dog, dated 1964. A placard with this image was displayed at a voter rights march in Amarillo, TX, as described by the Amarillo Globe-Times of 15 January 1968.