Here is another toy that I did not own but one of my friends owned, "Monster Machine". I remember making one or two of these monsters back in the day. Once again, I do not recall why I didn’t own this one either; it was right up my alley. But at least I had a friend that had one to play with at the time.
The “Monster Machine”roto-cast toy by Gabriel .You would fill the mold with the instant plaster, and clamp it into the roto-cast machine then crank until it sets. This gives a hollow plaster head that can be turned into a bank with the addition of a slot. Five molds include Frankenstein's Monster, Bigfoot, Hornagor, Dr. Jekyll and Mr. Hyde, and Galaxogg this was from 1977.