Original 1st printing 16&3/4 x 21&1/4" concert poster (or an uncut sheet of four 8&1/2 x 10&1/2" flyers) for Beacon Street Union appearing with the Hallucinations (featuring Peter Wolf, later of the J. Geils Band) and Blues Children (Friday only) at the Boston Tea Party (53 Berkeley St location) in Boston, MA from 2/17-18/1967.

 Artist unknown/not credited, thin flat index stock poster is in used (B-) condition; as you can see in the photo, this example has sustained a fairly heavy amount of edge/corner damage (missing areas of paper in all four corners, numerous tears, heavy creasing), along with several criss-crossing thin bends traversing the image area, stray staple holes, handling wear, a taped-up area in the right margin... definitely a well-worn survivor of the '60's.

 Conditional issues aside, still a very cool early BTP psychedelic item, one of the first images in the series.