Original 1st printing 17&3/8 x 22&7/8" concert poster for Quicksilver Messenger Service appearing with the Allman Brothers Band (with Duane Allman and Berry Oakley) and Z.Z. Top the Sam Houston Coliseum in Houston, TX on 6/6/1971. 

 Art by Jason Ironfeather (not credited), medium flat index stock poster is in excellent (B+) condition; there is a light to moderate degree of moisture warp to the paper, with a bit of vertical stress creasing/paper tightening and a few tiny edge dings scattered around the outer margin area, otherwise fine - no tears, holes, stains, etc.

 EXTREMELY hard-to-find/uncommon mid-'71 Duane/Berry-era Allman Brothers piece from Texas- this is only the second example from this venue that I have seen.