Original 1st printing 21&3/4 x 26&1/4" concert poster for the Grateful Dead appearing with the Sons of Champlin and Initial Shock at the Avalon Ballroom In San Francisco, CA from 1/24-26/1969.
Art by Rick Griffin, image ("Aoxoamoxoa") is featured in the Art of Rock book on page 109 (plate 2.24) and is part of the Soundproof Presents series.
Medium glossy-coated index stock poster is in SPARKLING near mint to excellent (A-/B+) condition; with the exception of the slightest whisper of surface wear (a stray fingerprint or two), a tiny thin bend in the lower left margin and a soft pinch ding or two hiding within the image area, this example is STUNNING.
An ULTRA-CRISP original 1st printing Griffin Aoxomoxoa Dead poster, one of the finest-looking specimens I have seen. Check out the 1/26 show (another great Charlie Miller transfer) HERE:
https://archive.org/details/gd1969-01-26.sbd.miller.109642.flac16