Original 1st printing 14&1/4 x 20&3/8" concert poster for South Side Sound System (with Charlie Musselwhite) appearing with the Phoenix and Freedom Highway at the Avalon Ballroom in San Francisco, CA from 9/8-10/1967.
 
 Art by Greg Irons, image is # 80 in the Family Dog/Avalon series.
 
 Medium flat vellum stock poster is in good to very good (B to B/B+) condition; there is a dark tape residue mark with a tack hole and a tiny nip tear in the top center margin, along with another tack hole in the bottom center margin, a bit of creasing along the left/right margins, a few semi-soft thin horizontal creases running along the lower left margin, a stray handling/stress crease or two hiding within the image area and a soft bend in the upper right corner/margin otherwise fine.

 Decent-looking semi-used example of this early Greg Irons Avalon poster.