Hi,
I think the Green Mask series info should be updated. It now says:
(1940 Series)
Summer 1940 - Oct-Nov 1946
Issues published: 1-v2#6 [#17]
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It should say:
(1940 Series)
Summer 1940 - Feb 1942
Issues published: #1-#9
(1944 series)
Aug 1944 - Oct-Nov 1946
Issues published 7:
#10-#11, v2#1-6
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The second series featured a different Green Mask, with a different secret ID.