Color satin-finish 11 x 17 photo of a Woodstock poster, signed in ink and felt tip by 21 participants. Signers are: Arlo Guthrie; John Sebastian; Doug Cosmo Clifford of Creedence Clearwater Revival; Jefferson Airplane’s Marty Balin and Jack Casady; Canned Heat’s Fito de la Parra, Harvey Mandel and Larry Taylor; Sly & the Family Stone’s Larry Graham, Jerry Martini and Cynthia Robinson; Sha Na Na’s Donny York and Jocko; Ten Years After’s Leo Lyons, Ric Lee and Chick Churchill; Tom Constanten of Grateful Dead; Gregg Rolie of Santana; David Sanborn of Paul Butterfield, Tommy Shannon of Johnny Winter Band; and Jim Fielder of Blood, Sweat & Tears. In fine condition, with some contrast to a couple of signatures. RRAuction COA.