Chambers Brothers & Iron Butterfly at Avalon Ballroom - 1967 (Poster)

Vintage poster (1st pressing) promoting shows with Chambers Brothers and Iron Butterfly at Avalon Ballroom in April of 1967. Designed by Victor Moscoso. A Family Dog Productions show. "20" written in pencil on the back.

Measures 14x20 inches. Some slight wear/crinkling. See photos.