©1956 National Comics Publications, Inc. made by Parks Plastic Company. 8.5z9" die-cut thin cardboard box has nice art image on front with Superman flying in mid-air looking at art image of Krypton rocket. Lid is designed to punch out at top and stand up and all perforations have splits. Box has color rubs around edges but otherwise Fine. Die-cut insert consists of three hard plastic pieces, each about 5" long. Includes reserve fuel tank, pump unit, rocket. Tail fins of rocket have relief “S” emblem and Superman logo plus name “Krypton Rocket”. Toy uses water as fuel and “Operates on a Real Jet Propulsion Principle”. Underside has illustrated instructions and offer for extra rockets. Insert and contents are unused and N.Mint. Nice design.