Copyright 1942 by Comic Magazines, Inc.
The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1943, New Series, Vol. 38, No. 2.
Writer credit revised from Joe Devlin ? to ? by Craig Delich 2013-4-6. Devlin did not write this strip according to the Who's Who. Artist correction from Joe (who did not exist) to John Devlin also made by Craig Delich.
Artist credit revised from Devlin to Dibble by D. Wilt 2018-05-19. Art is Dibble style and Bails credits him with this strip from 1943 onward.
Even though the Who's Who doesn't list Gustavson as a writer of the strip, Mike Kooiman and Jim Amash state in the Quality Companion that he created the strip and wrote it, so the question mark with the script credit has been removed by Craig Delich 2013-1-18. Also verified by Gustavson's son, Terry Gustafson.
Letterer credit courtesy of Terry Gustafson, Paul Gustavson's son.
Phantom Lady wears a mask.