April, 1968. 14 1/16" x 21 1/16". Fillmore Auditorium, San Francisco California. FINE. 

Janis Joplin / Big Brother & The Holding Company Concert Poster. With Iron Butterfly. Memphis soul-legend Booker T and the MGs were scheduled to play this concert, but cancelled to attend the funeral service for Dr. Martin Luther King who'd been killed just a week prior to the concert.. 

CGC Certified, in plastic framing.