Original 1st printing 17 x 22" concert poster for Traffic (featuring Steve Winwood) appearing with Hammer at the Boston Tea Party (15 Lansdowne St location) in Boston, MA from 11/10-11/1970. 

 Art by Eric Engstrom, medium-thick flat index stock poster is in decent (B/B-) condition; there is a small wedge of paper loss in the top right corner (about 1/2-3/4" square), along with a small pull in the top left corner, tape marks/staple/pinholes and creasing in all four corners, a fair amount of edge wear along the left/right margins (tiny creases/nip tears), a 1" tear in the right margin, a few soft pin-prick stains and tiny stress creases scattered within the image area, a touch of toning, a tape mark in the top center margin and a couple of tape pulls/remnants on the reverse, otherwise OK. 

 Conditional issues aside, this is not one of the easier-to-find late-period Tea Party posters.