Original 1st printing 17&1/2 x 22&1/2" concert poster for the Hallucinations (featuring Peter Wolf, later of the J. Geils Band) appearing on 10/27/1967 and the Bagatelle appearing on 10/28/1967, both supported by the Sidewinders, and held at the Boston Tea Party (53 Berkeley St location) in Boston, MA.

 Artist unknown/not credited, thin flat vellum stock poster is in BEAUTIFUL near mint to excellent (A-/B+ to B+) condition; aside from a few nearly-invisible surface dings (light handling,a stray soft pin-prick surface stain or two and a thin diagonal scratch going through the center of the image), a single pin/tack hole just above the silhouette's head and a touch of ink spread along the top margin, this example can not be topped.

 VERY cool-looking op-art/mod design on this one!