Laughing Mask / Purple Mask (Dennis Burton)

First appearance (as "Laughing Mask"): Daring Mystery Comics #2
(cover-dated February 1940)
NOTE: While there was no on-sale date listed for Daring Mystery Comics #2, the following issue (#3, cover-dated April 1940) is listed in the GCD as having an on-sale date of January 29, 1940.






at the end of that issue's story we see:


But in issue #3, we instead get:



And The Purple Mask appears again in Daring Mystery Comics #4 (May 1940)



Then in late 2007, Dennis Burton returns as "Laughing Mask" in the series The Twelve.


And from Marvel Mystery Handbook: 70th Anniversary Special (2009),

MajorHoy wrote:First appearance (as "Laughing Mask"): Daring Mystery Comics #2
(cover-dated February 1940)
NOTE: While there was no on-sale date listed for Daring Mystery Comics #2, the following issue (#3, cover-dated April 1940) is listed in the GCD as having an on-sale date of January 29, 1940.

By the way, this was posted in the thread for The Phantom Bullet (who also was one of the features in Daring Mystery Comics #2):

Philip K Ditko wrote:Mike's Amazing World gives the release date for Daring Mystery Comics #2 as 15 December 1939.