Original first printing 14 &1/4x20" concert poster for Big Brother and The Holding Company, The Charlatans, and Blue Cheer, at the Avalon Ballroom in San Francisco, CA on 3/31-4/1/1967. 
 
Art by Victor Moscoso.
 
The poster is in used condition.  The poster has multiple tackholes on all four corners.  There are tape pulls on three corners and two of the edges.  There is one torn corner.  There is a fold crease near one corner, some edgewear, and a smudge near the edge.  There are small red streaks on the back corner.  This poster was definitely hung up and diaplayed.