Original 2nd printing, 14x20" concert poster for The Young Rascals, and Quicksilver Messenger Service at the Fillmore Auditorium in San Francisco, CA on 8/19-20/1966. 
 
Art by Wes Wilson, image is #24 in the Bill Graham/Fillmore series. 
 
The poster is in very good vintage condition.  There are two small staple pulls at the top corners. Also very light edgewear and creasing.