Original 1st printing 8&1/2 x 11" concert flyer for Big Brother & the Holding Company (featuring Janis Joplin)* appearing at the Matrix in San Francisco, CA from 4/25-27/1967.
 
 Art by Leidenthal, image is featured in the Art of Rock book on page 163 (plate 2.110). 

Thin flat stock flyer is in STUNNING near mint (A- to A-/B+) condition; aside from a touch of negligible edge wear, a tiny bend in the lower left corner and a nearly-invisible handling ding or two hiding within the image area, it is an absolutely GORGEOUS example of this perennially popular (and oft-requested) Big Brother item from the AOR.