They were made of different materials such as cast iron, aluminum, & wood. These machines will range in size and shape and as to what you are gambling on. We are especially interested in the early machines used in the first half of this century. These old slot machines were widely used all across the country just as they are today. If you have more than one machine even better as we are looking for many different models. If the machine is incomplete and doesn't work we don't care. We are very interested in buying your old mechanical slot machine no matter what the condition. Want to sell your old slot machine and get top dollar?