Original 1st printing 12&5/8 x 20" concert poster for Quicksilver Messenger Service appearing with Big Brother & the Holding Company (featuring Janis Joplin) and the Congress of Wonders at Winterland in San Francisco, CA from 12/16-17/1966.
Design by Gut (Allen Turk), image is featured in the Art of Rock on page 194 (plate 2.207).
Medium flat vellum stock poster is in BEAUTIFUL near mint (A- to A-/B+) condition; aside from a couple of ULTRA-tiny edge nips along the left margin and the slightest whisper of handling, this example looks like it just rolled off the press.
GORGEOUS specimen of this festive holiday-themed Winterland poster.