The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1942, New Series, Vol. 37, No. 2.
Art credits from Jim Amash on page 18 of 2011's Quality Companion from TwoMorrows, which shows Fox holding his original cover art for this issue.
The Swordfish is his one-man submarine; super-graphic injury-to-eye panel.