Tendril-like letters twined about a heart, a frequent Griffin motif used here as a symbol of brotherhood and life source, advertised Big Brother, an abbreviated reference to 'brotherhood', and Santana at the Fillmore West.
Both variations of the postcard were printed before the concert and measure 4 5/8" x 7".
1st printing A has a bright medium blue background.
1st printing B has a rich dark blue background.
There were also some pre-concert mailers printed that were conjoined with the BG137 image. They measure 7" x 9 1/4".
Rick Griffin grew up in the surfing culture of Southern California, a milieu which had a profound influence on his art. After high school, he worked on the staff of Surfer magazine and created the best-known surfing cartoon character of the time, Murphy. After his move to San Francisco in 1967, be began combining eclectic typefaces and decorative borders with brilliant colors in his concert posters. Griffin's compositions were complex without being illegible. A perfectionist, Griffin often applied dozens of overlays and redrew lettering again and again until he was satisfied. In the early 1970s, Griffin became a born-again Christian and religious themes dominated his work until his death in a motorcycle accident in 1991.