This issue has variants.
Though credited as the editor, Julius Schwartz didn't actually edit the main contents as they were done in secret to celebrate his 70th birthday. Via Facebook, Bob Rozakis confirmed he "spoke with Maggin about the story before he wrote it, coordinated moving the script and art through the system and into production," acting as the de facto editor for most of the issue's contents.
On-sale date from DC Releases #16.
Via Facebook, Bob Rozakis relayed that he believed Giordano penciled and inked the cover, though he couldn't say with absolute certainty. Letters credit from Todd Klein.
This story celebrates Julius Schwartz' 70th birthday. The story credits include "AIDED AND ABETTED BY DICK GIORDANO * PAUL LEVITZ * BOB ROZAKIS."
"Cover" of the "Special MASK Preview."
This is a preview insert in this comic.