The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1940, New Series, Vol. 35, No. 4.
The story title is taken from the cover blurb.
first line: "A trim yacht cuts the spray out of New York harbor,..."
The art style softens as the story progresses, and Hames Ware suggests that perhaps Art Saaf might be involved with the inks.