We recently acquired this beautiful Erector Rocket Launcher Set from 1958. While not quite complete, it is still tantalizing with its girders, nuts, bolts and motor. The printing on the metal box is beautiful.
The motor is labeled “Erector Electric Engine” and features a clever mechanical gear shifter.
While our set did not come with instructions, there are online resources for vintage building sets, and Girders & Gears has a thorough description and pictures of a more complete set. They also have instructions available for download, which include the following practical warning:
CAUTION: Be sure there is no one in front of the launcher when the rocket is fired.