Original 1st printing 15 x 22" concert poster for Chicago appearing with the Allman Brothers Band (featuring Duane Allman and Berry Oakley) and Edison Electric Band at the Spectrum in Philadelphia, PA on 8/12/1970.

 Artist unknown/not credited, medium-thick glossy-coated index stock poster is in good/decent (B to B/B-) condition; a 1/4 x 1/2" nip out of the top right corner tip, a series of pin/tack holes along the top/bottom margins, several decent-sized handling bends and corner/edge creases, a thin 7" scuff mark traversing the ticket outlet area, a couple of very small edge tears, a few tiny pin-prick surface spots scattered around the image area, a hint of toning/water staining (mostly along the left edge) and several good-sized tape pulls on the reverse, otherwise fine- this example was VERY likely (almost certainly) pulled down from public display in 1970.

 MEGA-scarce low-run regional Duane/Berry-era Allman Brothers concert poster from the legendary Philadelphia Spectrum.