Original 1st printing (2nd state/monochrome version) 22&5/8 x 14&1/4" concert poster for Big Brother & the Holding Company (with Janis Joplin) appearing with Quicksilver Messenger Service, the Charlatans and the Sparrow (pre-Steppenwolf) at the Tamalpais Mountain Amphitheater in Marin County, CA on 4/8/1967.
 
 Art by Allen "Gut" Terk, medium-thick flat vellum stock poster is in near mint (A-/B+) condition; just a few tiny stress dings scattered along the bottom margin, a whisper of handling wear and a couple of small corner-tip pressure creases, otherwise it is a GORGEOUS example of this early-'67 Big Brother/Quicksilver concert artifact from Marin County.