Original 1st printing 14 x 20&3/8" concert poster for Texas blues legend Lightnin' Hopkins appearing at the Matrix in San Francisco, CA from 10/7-16/1966. 
 
 Art by Tom Weller (not credited), medium-thick flat vellum stock poster is in decent/used (B/B- to B-) condition; there are several staple/tack holes in all four corners and scattered around the outer margin area (plus a few hiding within the image area), with small wedge pulls/tears in the lower left/upper right corners and old tape marks in the top left/bottom right margins, a large 2" crescent-shaped tear in the left center margin ,a 1&1/2 x 4" stain/discoloration in the right center margin, a series of small edge tears scatterd along the right margin, a bit of mild paper aging/toning, a couple of thin horizontal stress bends along the left margin and a few other little minor issues here and there... definitely a bit on the worn side, but still a VERY hard-to-find late-'66 Matrix poster.