Original 1st printing 8&1/2x11" concert flyer/handbill for Daily Flash, Quicksilver Messenger Service, and Country Joe & The Fish at the Avalon Ballroom in San Francisco, Ca, on 11/18-19/1966.  
 
Image is #35 in the Family Dog/Avalon series. 
 
Art by Alton Kelly and Stanley Mouse
 
The flyer is in great condition.  There is some paper wear on th back but it doesn't show through.  No pinholes or tackholes.