Original 1st printing 14&1/4 x 22&1/2" concert poster for the Grateful Dead appearing with River at Springer's Ballroom in Gresham, OR on 1/16/1970.

 Art by Jim Blashfield, image is featured in the Art of Rock on page 376 (plate 4.136).

 Medium-thick flat index stock poster is in near mint to excellent (A-/B+ to B+) condition; there are a couple of extra-tiny roll creases and a touch of toning along the extreme upper right margin, along with a tiny corner bump or two, a soft stain on the reverse and there may be a nearly-invisible handling ding or two hiding within the image area, but for the most part it is a VERY sharp/crisp (almost-mint) example of this semi-uncommon early-1970 Grateful Dead poster from Oregon.

 Check out a fine recording of the show HERE:

https://archive.org/details/gd70-01-16.sbd.popi.7111.sbeok.shnf/gd70-01-16d1t01.shn