Original 1st printing 13&1/8 x 16&1/8" concert poster for the Grateful Dead appearing with the Flying Burrito Brothers (with Gram Parsons and Chris Hillman) and AUM at the Avalon Ballroom in San Francisco, CA from 4/4-6/1969.
 
 Artist unknown/not credited, image is featured in the Art of Rock on page 111 (plate 2.26).
 
 Medium flat index stock poster is in excellent (B+) condition; aside from a nearly-invisible set of pin holes (top left/right corners), a soft bend in the left margin and a couple of light handling dings here and there, it is a GREAT-looking example of this totally bizarre Grateful Dead image from the Soundproof series.
 
 Check out this FASCINATING blog post detailing the story behind the shows, specifically the influence of Burritos pedal steel player Sneaky Pete Kleinow on Jerry Garcia;
 
http://lostlivedead.blogspot.com/2017/06/jerry-garcia-sneaky-pete-kleinow-and.html