Muted patriotic hues dominated Mari Tepper's unusual family portrait advertising Country Joe & the Fish and Moby Grape on deflated balloons.
The postcard was only printed once before the concert. It measures 4 5/8" x 7 1/4".
There were also some pre-concert double-sized mailers printed that were conjoined with the BG117 image (see BG117/118). They measure 4 5/8" x 14 1/2".