Original 1st printing 11&5/8 x 17&3/8" concert poster for Linn County appearing with Indian Head Band and Allmen Joy at the Ark in Sausalito, CA from 6/14-16/1968.
 
 Artist unknown, medium-thick flat vellum stock is in decent/used (B/B- to B-) condition; there is a fairly large arc-shaped 6" tear that extends from the bottom center margin (just below the "n" of "Allmen") up to the "15" (sealed on the reverse with clear packing tape), along with a heavy amount of creasing/wear along the bottom edge, a small puncture tear on the "o" of "Joy", a couple of small edge tears in the lower left/bottom margins, a couple of tiny pin-prick age spots and a couple of tiny bends in the upper left/right corners, otherwise OK... the majority of the damage on this one is mostly confined to the lower portion of the poster, the upper 75% looks just fine.

 Conditional issues aside, this is one of the harder-to-find 1968 Ark posters- first one I have had to offer.