Original 1st printing 13 x 20&1/8" concert poster for Ten Years After appearing with Procol Harum (featuring Robin Trower) and Leon Russell at the Spectrum in Philadelphia, PA on 11/14/1970.

 Designer unknown/not credited, medium flat index stock poster is in SUPERB near mint to excellent (A-/B+ to B+) condition; aside from a tiny moisture stain/discoloration and a hairline bend in the lower left corner tip, a tiny thin horizontal bend in the upper right margin, a trace of surface wear (a thin scratch or two) and a couple of nearly-invisible handling dings, this one is just about as clean as they come.

 Great-looking example of this late-1970 poster from the Electric Factory series.