#297K

Although, fifth printing as per copyright page, possibly a misidentified sixth printing of April 1958. The copyright page of the fifteenth printing includes, but is not limited to; sixth printing-April 1958, seventh printing-November 1958, eighth printing-April 1959, ninth printing-October 1959 and tenth printing-May 1960. The tenth printing is confirmed, by Jason Buer of https://www.themadmuseum.com/index.html, to have 297K and 35¢ printed on the cover, providing some evidence the sixth through tenth printings were near identical.