Original 1st printing 15&1/2 x 22&1/8" concert poster for Chicago appearing with River at Springer's Ballroom outside of Portland, OR on 3/15/1970.

 Art by Michael James Strickland, medium-thick flat index stock poster is in excellent (B+) condition; there is a thin 2" diagonal bend in the lower right corner, a hard 1" diagonal bend and a bit of light creasing in the upper left margin, a series of thin horizontal stress/roll bends along the left margin and a few scattered handling/edge dings, otherwise fine.

 A great-looking low-run psychedelic poster from the fondly-remembered Oregon ballroom, featuring one of the biggest acts of 1970 (by the end of the year, they were headlining arena-level venues). GREAT colors on this one.