Original 1st printing 14 x 20&1/4" poster for "Super Ball", a benefit concert for striking workers from FM rock station KMPX, held at Winterland in San Francisco, CA on 4/3/1968.

 No acts are listed, but the show apparently featured appearances by the Grateful Dead, Electric Flag, Mother Earth, the Youngbloods, Moby Grape and It's A Beautiful Day.

 Art by San Andreas Fault (Tad Hunter), medium flat index stock poster is in very good (B/B+) condition; there are a few tack holes in a couple of the corners and along the outer margins, along with a hand-corrected price alteration (from $5.00 to $3.00, rendered in black marker), a few stray handling dings/light creases here and there, a light amount of surface wear (a trace of dust and a few tiny pin-prick spots) and a bit of pen scratch on the reverse, otherwise fine.

 Pretty cool-looking early-'68 KMPX benefit poster with bright colors and a great design.