Original 1st printing 14 x 21&1/4" concert poster for Big Brother & the Holding Company (featuring Janis Joplin) appearing with Iron Butterfly and Booker T. & the MG's at the Fillmore Auditorium and Winterland in San Francisco, CA from 4/11-13/1968. 
 
 Art by Patrick Lofthouse, image is # 115 in the Bill Graham/Fillmore series.
 
 Medium-thick flat index stock poster is in near mint (A-) condition; there is a tiny pin-prick spot on the reverse side and a nearly-invisible hairline bend in the bottom left corner tip, otherwise it is a nearly-perfect example of this always-popular early-'68 Big Brother Fillmore poster.