Original 1st printing 22&1/8 x 28" concert poster for blues legend Big Joe Williams appearing with the Conqueroo on 3/1-2/1968 and Shiva's Head Band appearing with the Rubiyyat on 3/8-9/1968, both shows held at the Vulcan Gas Company in Austin, TX. 

 Art by Robert Rush, image ("Plant Forms") is # 16 the VG/Vulcan Gas Company series.

 Thick flat vellum stock poster is in good to very good (B to B/B+) condition; a bit of light creasing around the edges, a couple of small tape pulls in the top center margin, a 1 x 1/4" area of missing paper in the top right margin, a few tiny edge tears and a stray surface stain or two, otherwise fine.

An overall very decent example of this somewhat hard-to-find early Vulcan Gas poster.