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 (poster is credited to "L.B. Johnson"), medium-thick flat vellum stock poster is in good (B) condition; there is a 1/2" diagonal nip out of the upper left corner, along with a 1" diagonal bend (with a tiny edge split) in the upper right corner, a series of nearly-invisible tape shadows in the top/bottom left/right margins, a trace of handling wear and a few light tape pulls/toning on the reverse, otherwise fine.

 Very strange San Francisco poster from a really interesting (psychedelically-enhanced) early-'67 Digger event. The handbill image can be seen in in the Art of Rock book on page 177.