Original 1st printing 14x20" concert poster for Blue Cheer, Clifon Chenier and Lee Michaels at the Avalon Ballroom in San Francisco, Ca, on 10/6-8/1967.  
 
Image is #86 in the Family Dog/Avalon series. 
 
Art by Victor Moscoso.
 
The poster is in excellent condition.  There is a printing streak on the red area, and a tiny smudge.