Early and uncommon contractor's model of the S-IVB, the powerful third stage of the Saturn V super heavy-lift launch vehicle. The model is composed of two parts, both of which are displayed on rolling transports true to real life. The first being the conical aft interstage, 4" x 2.5", with interior bearing a Douglas Aircraft Company emblem; and the second being the main thrust structure with single J-2 rocket engine, the top and bottom of which bear the Douglas emblem and "S IV B" designation. In fine condition, with light scattered scuffs and marks. Accompanied by its original shipping box with Douglas label. The S-IVB, the third stage of the Saturn V rocket, was the one of the largest liquid hydrogen stages produced in the 1960s. Equipped with one J-2 rocket engine, it produced about 225,000 pounds of thrust. It was 21 feet 8 inches in diameter and 58 feet 8 inches high.
