Blues Project at The Matrix Fillmore San Francisco Concert Poster Rare c1970

Blues Project at The Matrix Fillmore San Francisco Concert Poster Rare circa 1970.  The poster is extremely rare and very large.  The artist on this piece is Seymour Chwast.  The poster measures 29"X40".
The piece has significant condition issues:  It has been stored folded for over 50 years.  At the fold the paper has split.  When the piece is laid flat it is difficult to see these tears.  There is also tape marks from old 1960's tape marks, rips with pieces missing and creasing all around the border,  The cream base has darkened on parts of the piece.  There are some pinholes and creasing throughout.  Please look at the many photos of the poster.  
Poster will ship rolled