Original 1st printing 6&5/8 x 14" concert flyer for "Bilbo's Birthday", a one-off show featuring Big Brother & the Holding Company (featuring Janis Joplin) appearing with the Great Society (featuring Grace Slick) and the Charlatans at California Hall in San Francisco, CA on 7/28/1966.
 
 Art by Passalaqua, image is featured in the Art of Rock on page 177 (plate 2.156). 

 Medium-thick flat vellum stock flyer is in good/decent (B to B/B-) condition; there is a thin 4" horizontal pen scratch just beneath the ticket outlet strip, along with a couple of thin horizontal stress creases, a smll pin-prick spot/stain in the lower right margin/corner, a light amount of surface dirt, a couple of tiny diagonal corner-tip creases and a set of light tape marks on the reverse, otherwise fine.
 
 Very decent example of this strange-looking mid-'66 California Hall flyer. EARLY Janis/Big Brother piece, we have a very uncommon alternate flyer from this show listed separately.