Art by Cliff Young. "World's Finest" #5 (Spring 1942). This is the final golden age appeararance of the original Sandman costume. At the time of publication, the yellow and purple superhero costume and Sandy the sidekick had already been introduced in "Adventure Comics."
Details from the first page of "Action Comics" #1, by Jerry Seigel and Joe Shuster, who were paid $10 for the page. Published April 18, 1938 (dated June). Scanned from an oversized reprint: "Famous First Editions" #C-26, 1974.