Original 1st printing 13&3/4 x 20&1/4" concert poster for the Grateful Dead appearing at Sound Storm, a three day event held at York Farm near Poynette, WI on 4/24-26/1970 (*festival was originally to be held at Aquarian Express Farm in Madison, the Dead performed on Sunday the 26th).
Design by Robert Ocegueda, poster lists (in addition to the Dead) Ken Kesey and the Merry Pranksters and Country Joe McDonald (*both canceled), Crow, Rotary Connection (featuring Minnie Ripperton), Illinois Speed Press, Baby Huey (and the Babysitters) and a host of local bands (with names such as "Galactic Vision", Captain Billy's Whiz Band", "Wheezer Lockinger") and more.
Medium-thin flat index stock poster is in excellent (B+) condition; there are a few stray tiny handling dings here and there, a hairline-thin 6-7" diagonal bend in the lower left corner, a bit of light creasing wear (mostly around the extreme) outer margin area and a whisper of surface wear, otherwise fine.
VERY uncommon low-run regional Dead concert poster from a fairly small/out-of-the-way Wisconsin festival, about which not much was known until recently. Check out a GREAT blog post about the event HERE: