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 decent/used (B/B- to B-) condition; there is a moderate amount of toning to the paper, along with tack/staple holes/creasing and a bit of rounding to the corner tips (all four corners), a 6-7" diagonal bend in the upper left corner/margin, a series of tiny edge dings/nip tears scattered around the outer margin area and a bit of light smudging in the lower left corner, otherwise OK... a somewhat used (but still presentable) example of this early-'67 Big Brother/Quicksilver concert poster from Marin County.