Original 1st printing 16&5/8 x 21&7/8" concert poster for the Grateful Dead appearing with the New Riders of the Purple Sage at Hill Auditorium on the campus of the University of Michigan in Ann Arbor, MI on 12/15/1971.

 Art by (and SIGNED in black razor-tip pen by) Gary Grimshaw, image is featured in the Art of Rock book on page 393 (plate 4.187).

 Medium-thick vellum stock poster is in very good to excellent (B/B+ to B+) condition; there is an approximately 1&1/2" diagonal tear (sealed on the reverse with clear tape) in the lower right margin/corner, along with a few light corner/margin creases, a touch of handling wear, a stray surface scuff or two and a couple of light stains on the reverse, otherwise fine.

 A very nice-looking ARTIST-SIGNED example of this classic Grimshaw Grateful Dead poster, most of the conditional issues are fairly negligible. Check out a very crisp-sounding soundboard recording of the show HERE:

https://archive.org/details/gd1971-12-14.140950.sbd.betty.pcm.dalton.miller.clugston.flac1644