Original 1st printing 11 x 16&7/8" concert poster for Mountain (featuring Leslie West) appearing with Humble Pie (featuring Steve Marriott and Peter Frampton) and Eric Mercury at the Boston Tea Party (15 Lansdowne Street location) in Boston, MA from 11/20-22/1969.

 Art by Eric Engstrom, medium flat index stock poster is in near mint (A-/B+) condition; just a tiny thin diagonal bend in the lower left corner, a tiny bump in the bottom right corner tip, a VERY subtle moisture discoloration along the upper right margin and a stray soft pinch ding or two hiding within the image area, otherwise fine.

 SUPERB-looking original 1st printing 1969 Tea Party poster with an unusual design and an great lineup.