Official 1991 2nd printing 19&1/2 x 35&1/2" extra-large silkscreen concert poster for the Grateful Dead appearing with Quicksilver Messenger Service and Big Brother & the Holding Company (featuring Janis Joplin) at Winterland in San Francisco, CA on 10/31/1967. 

 Art by (and SIGNED by) Alton Kelley and Stanley Mouse (with Rick Griffin, no RG signature), image ("Trip or Freak") is featured in the Art of Rock on page 185 (plate 2.183). 

 Extra-thick flat oak-tag stock (printed/embossed by Mouse) silkscreen poster is in fantastic mint/near mint to near mint (A/A- to A-) condition; an absolutely GORGEOUS example of this classic Grateful Dead/QMS/BBHC/Mouse/Kelley/Griffin image.