Original 1st printing 14 x 19&1/4" concert poster for Big Brother & the Holding Company (with Janis Joplin) appearing with Fleetwood Mac (featuring Peter Green) and Dr. John the Night Tripper*, at the Carousel Ballroom in San Francisco, CA from 6/20-23/1968. (*- Dr. John canceled; most distributed examples have his name crossed out with magic marker- this one is NOT marked)
Art by Bob Seidemann, medium flat vellum stock poster is in very good/decent (B/B+) condition; a series of scattered handling bends/soft creases around the outer margins and within the image area, a few stray soft surface spots/light stains (including a 1/2" diameter stain/mark in the middle of the image area), a light to moderate amount of edge toning and a semi-soft crescent shaped bend (about 2") in the bottom right corner, otherwise fine.
Overall a very charming example of this very strange-looking late-period Carousel poster. These shows were JUST before Bill Graham took the venue over and renamed it "Fillmore West".