Original 1st printing 17 x 17" square concert poster for Mountain (featuring Leslie West) appearing with rock & roll pioneer Ronnie Hawkins at the Boston Tea Party (15 Lansdowne Street location) in Boston, MA from 4/2-4/1970.

 Art by Bob Driscoll (not credited), medium flat index stock poster is in FANTASTIC near mint (A-/B+) condition; just a couple of tiny soft pinch dings/thin hairline bends around the outer margin area and a tiny edge nick or tow, otherwise it is a SPECTACULAR-looking original 1st printing 1970 Tea Party poster with a great photo of Leslie West in action. VERY hard-to-find BTP poster.