Original 1st printing 18&1/2 x 11" mimeograph concert flyer for "Bilbo's Birthday Party", a show featuring the Great Society (with a pre-Jefferson Airplane Grace Slick) appearing with the Charlatans and Big Brother & the Holding Company (with Janis Joplin), held at California Hall in San Francisco, CA on 7/28/1966 (*no date listed other than "Thursday"; poster (with the date) is featured in the Art of Rock on page 178, plate 2.156).

 Art by C. Harris, thin flat stock flyer (PINK stock version) is in very good to excellent (B/B+ to B+) condition; there is a small wedge-pull hole in the upper left corner, along with a pair of pin holes in the top center margin and in the second "b" of "Bilbo", a VERY thin flattened horizontal crease just below the center of the image area, a few tiny edge/corner-tip creases, a trace of handling wear and a couple of thin diagonal bends in the lower left/right corners, otherwise fine.

 ULTRA-UNCOMMON 1966 Big Brother/Great Society/Charlatans concert item from California Hall, first one of these I have seen.