Original 1st printing 13&5/8 x 19&3/4" concert/event poster for "Bedrock One", a benefit for the Communications Company (publishers of the Diggers' Haight-Ashbury neighborhood newsletters), held at California Hall in San Francisco, CA on 3/5/1967. Participants/performers included the San Francisco Mime Troupe, the Committee, the Steve Miller (Blues) Band, the Orkustra, Dino Valenti and more.
 
 Artist unknown, thick flat vellum stock poster is in gret vintage condition.  There is a small corner tear on one corner and a smal bend in another corner.  Some tape pulls in the back that don't show through.
 
 VERY trippy-looking San Francisco poster from a really interesting early-'67 Digger event. The handbill image can be seen in in the Art of Rock book on page 177.