Original 1st printing (blue Pacific Printing credit/printer's strike marks in bottom/right margins) 17&1/2 x 22&5/8" concert poster for Led Zeppelin appearing with Jethro Tull and the Fraternity of Man at the Earl Warren Showgrounds Arena in Santa Barbara, CA on 8/1/1969.
Art by Frank Bettencourt, image is featured in the Art of Rock book on page 267 (plate 3.41) and is part of the Jim Salzer Presents series.
Medium-thin flat index stock poster is in excellent (B+) condition; a touch of light creasing/crinkling, a sliver of toning and a couple of extra-tiny edge tears along the left/right margins, a semi-pronounced pinch bend in the bottom right corner and a well-hidden pinch/stress bend or two hiding within the image area, and that's IT.
Overall, this is a great-looking example of an original 1st printing 1969 Zeppelin poster from one of their earliest Southern California appearances; check out a great informative list of 1960's-era shows (including this one) at the Earl Warren Showgrounds: