Now this is a KEY book!!! The origin and 1st appearance of Mr. Mxyztplk in comic books AND Superman flies for the first time.
Minor/moderate spine roll, name penciled on cover, 5" fc crease, other
slight creases visible in scan, BEAUTIFUL O/W to White pages.
2008 OS Value = FN 6.0 = $786.00; VF 8.0 = $1,638.