I'm selling Superman #191 (Nov 1966, DC).  This item is ungraded, but there are imperfections.  Please look at the photos included and purchase accordingly.  Contact me if you have any questions.

Cover pencils by Curt Swan, inks by George Klein. Two-part story in which Superman wears a mystic jewel that brainwashes him into helping demons do evil: The Prisoner of Demon! [part 1], script by Jim Shooter, art by Al Plastino. Demo the Diabolical! [part 2]. 36 pgs. $0.12. Cover price $0.12.