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 near mint to excellent (A-/B+ to B+) condition; just a light amount of surface rubbing in the black pass of ink (concentrated mostly in the upper left corner and on the right side of "Grateful Dead"), a few ultra-tiny hairline stress bends and soft handling dings scattered around the outer margin area and a hint of corner-tip/edge wear (a couple of ultra-tiny dings), otherwise fine.

 GREAT-looking example of this classic 1972 Grateful Dead concert poster from Sacramento. Check out the show (complete with amusing between-song banter) HERE:

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