Superman (1939 1st Series) #218 FN
Published Jul 1969 by DC.
Cover pencils by Curt Swan, inks by Neal Adams. Superman's Secret Past!, script by Leo Dorfman, pencils by Curt Swan, inks by Jack Abel; Could Superman be a two-timing super-deadbeat?. The World of Mr. Mxyzptlk!, script by Jerry Siegel, art by Al Plastino; After yet another round of pranks from Mr. Mxyzptlk, Superman travels to the fifth dimensional world where Mxyzptlk lives to perform pranks on him. This first 15c cover-priced issue contains a half-page letter from the editors explaining why DC increased the cover price of their comics from 12c to 15c. 36 pgs. $0.15. Cover price $0.15.