tOriginal first printing 14x22" concert poster for Santana, Grand Funk Railroad, and Fat Matress with Noel Redding, at the Winterland Auditorium in San Francisco, CA on 12/18-21/1969.
 
Art by, and signed by, David Singer. image is #207 in the Bill Graham/Fillmore series. 
 
The poster is in good vintage condition.  There is a small tear in one of the corners, a set of tackholes, and some handling creases throughout.  The back has some tape pulls, but they don't show through.