The initial print run of this volume was missing a page. DC recalled the book. The last page of the 7-page story, "Death Held The Lantern High," which starts on page 468 was omitted. If the following story, "The Specters Were The Stars," begins on page 474 then you have the error edition. If it starts on 475, then you have the corrected edition.
"Corrected edition" is a bit of a misnomer however. To make room for the missing page from "Death Held The Lantern High," the one page story "Phantoms of the Flash!" has been omitted for the second printing. That story may be found on page 482 of this printing. So neither printing is complete.