Original 1st printing 11 x 17" concert poster for Al Kooper appearing with King Crimson and Aum at the Boston Tea Party (15 Lansdowne Street location) in Boston, MA from 10/30-11/1/1969.

 Art by Eric Engstrom, medium-thick flat index stock poster is in near mint to excellent (A-/B+ to B+) condition; there are a couple of extra-tiny corner-tip bumps, a touch of edge wear (a series of tiny white spots, possibly from the press) along the top margin and a soft vertical roller mark (also from the printing press) about 2-4" in from the left margin, otherwise fine... the paper itself is essentially mint/near mint, there are just a couple of VERY minor printing flaws on this one.

 GORGEOUS example of this late-'69 BTP poster with eye-searing contrasting colors.