This is a Prelimary Artwork of the MAD magazine paperback "The MAD Guide to Careers" by Stan Hart and Paul Coker, Jr. Paul Coker, Jr. signed his work with Leonardo DaVinci. This preliminary sketch is already very similar to the final drawing. The size of the drawing corresponds to the size of the paperbacks. This is rather untypical, because the original covers were usually painted on larger surfaces. The back of the drawing shows the approval signature of Howard Kaminsky, the former editor at Warner Books.