Original 1st printing 14&1/4 (appx.- the right side is irregularly cut on every one of these) x 20&1/2" concert poster for the Canned Heat (Blues Band) appearing with Big Brother & the Holding Company (featuring Janis Joplin) at the Avalon Ballroom in San Francisco, CA from 6/8-11/1967.
Art by Rick Griffin, image ("Magic Show") is # 65 in the Family Dog/Avalon series.
Medium flat index stock poster is in ultra-crisp near mint to excellent (A-/B+ to B+) condition; a set of microscopic pin holes in the corner tips (these are VERY hard to see), a 3/8" bend in the top left corner, a tiny edge ding or two and a nearly-invisible vertical press indentation running down the right margin, otherwise it is an absolutely GORGEOUS 1st printing/white-border version of this somewhat controversial Rick Griffin image from the Avalon.