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

Designer unknown/not credited, medium-thick glossy-coated index stock concert poster is in good/decent (B to B/B-) condition; there is a pronounced horizontal center crease, along with a series of semi-camouflaged thin horizontal stress creases zig-zagging across the image area, a bit of edge wear, a trio of edge tears along the top margin, a white surface chip on the left side of the image area, a crescent-shaped dark pressure crease/stain in the right center margin and a few ultra-tiny pin-prick spots scattered around the outer margin area, otherwise OK.

Neat-looking mid-1970 oddball Duane-era ABB concert artifact from Philly.