Original 1st printing 14 x 20" concert poster for Big Brother & the Holding Company (featuring Janis Joplin) appearing with Blue Cheer and the Charlatans  at the Avalon Ballroom in San Francisco, CA from 3/31-4/1/1967. 

 Art by Victor Moscoso, image is # 55 in the Family Dog/Avalon series.

 Medium flat index stock poster is in decent (B/B-) condition; there is a a heavy/pronounced curl to the paper, along with a series of horizontal roll bends/creases traversing the image area from the top to the bottom edge, several fairly well-hidden tack/pin holes in the top/bottom center margins, a few semi-camouflaged hairline-thin stress creases, tiny pin-prick age spots and handling dings scattered around the image area and a few tiny edge dings/pressure creases scattered around the outer margin area, otherwise OK.