Original 1st printing 12&5/8 x 20" concert poster for Quicksilver Messenger Service appearing with Big Brother & the Holding Company (featuring Janis Joplin), the Loving Impuse, the S.F. Earthquake Dancers and the Congress of Wonders at the Shrine Auditorium in Los Angeles, CA on 12/18/1966. (*possibly cancelled)
 
 Design by Gut (Allan Terk), an almost-identical image from a Winterland show is featured in the Art of Rock on page 194 (plate 2.207).
 
 Medium flat vellum stock poster is in near mint to excellent (A-/B+ to B+) condition; there is a small semi-pronounced pressure crease in the lower right margin and a couple of negligible edge/corner-tip creases scattered around the outer margin area, but for the most part it's pretty clean.
 
 BEAUTIFUL example of this festive holiday-themed Big Brother/Quicksilver concert poster from late-'66.