Having been formed only a year before, the band Mountain was already gaining steam before this headline performance heralded for the Boston Tea Party on January 2-3, 1970, with Blues Project 2 and Dion opening. A great shot of an early iteration of Leslie West's band is featured on a white background, and the 11x17" poster, mounted on linen to 14x20" is in solid EX-NRMT condition, with only slight yellowing at the edges preventing this from being a perfect specimen.