Original 1st printing 13&1/8 x 19&1/2" concert poster for Big Brother and the Holding Company (featuring Janis Joplin) appearing with Bob Seger and the Last Heard and the Purple Cucumbers at the Cheetah (Aragon Ballroom) in Chicago, IL from 3/22-24/1968. 

 Design by "Shrewd Productions", medium-thin glossy stock poster is in excellent (B+) condition; aside from a couple of VERY subtle/nearly invisible horizontal roll bends and stress creases hiding within the image area and a tiny pair of diagonal corner-tip creases (upper left/right corners), this example is in FANTASTIC shape.

ABSOLUTELY KILLER Janis Joplin image on this poster, the first one of these that I have come across!