Two album cover proofs for the Jimi Hendrix Experience/Otis Redding album “Historic Performances Recorded at the Monterey International Pop Festival” used in the production of the album cover.  The front cover proof is signed by legendary photographer Jim Marshall, who shot the album cover photos. It measures  13 1/2″ x 14″ and is in excellent condition.   The back cover proof has production notes specifying changes to be made, and is initialed by Warner Bros. Records art director Ed Thrasher, creative director Stan Cornyn, and someone named “Glendale”.  It measures 14″ x 14″ and is in very good plus condition.  A rare opportunity to obtain two pieces of Hendrix album cover artwork used in the production of the album.