Original 1st printing 20&7/8 x 16&1/4" concert poster for the Grateful Dead appearing at the Sacramento (CA) Memorial Auditorium on 8/12/1972. 

 Design by/show presented by Pacific Presentations, a nearly-identical image (from Seattle) is featured in the Art of Rock book on page 377 (plate 4.141).

 Medium-thick flat vellum stock poster is in excellent (B+) condition; really nothing more than a couple of minuscule edge/corner-tip dings, a tiny "mouse bite" nip in the upper right margin, a loose fingerprint smuge or two hiding within the image area and a whisper of surface scuffing around the "ful" of "Grateful", otherwise it is an absolutely GORGEOUS (nearly-flawless) example of this always-popular early-'70's Pacific Presentations Dead poster.

 Check out the show (complete with amusing between-song banter) HERE: 

https://archive.org/details/gd1972-08-12.sbd.smith.gems.105132.flac16