A particularly collectible machine of that era is the boxy globe-less Ro-bo machine, which is similar to the Pulver machines of the early 1900s that held nodding puppets. In the Ro-bo, once you inserted a penny, a gumball dropped from a display case at the top and then an automated human figurine would pick it up and drop it to you down a chute. Any ’20s gumball machine with such clever automated action is highly sought-after.

During Prohibition, gambling, be it cards or slot machines, was banned along with alcohol. You might be surprised to know that some gumball machines were disposed of, as they were considered a form of gambling. One such outlawed machine, the Hawkeye, was built so that on every 10th pull of its lever, a bell would ring and the customer would get his or her penny back along with the gumball.

The 1930s Ad-Lee E-Z had a marquee attached to the top and contained gum with paper inserted into it through a hole drilled in the center. The customer would compare the score on their piece of paper to the score on the marquee, and receive a prize from the store clerk.

Vending machines got simpler after World War II; they were made of plastic and cheaper metal like aluminum, and their mechanical inner workings were uncomplicated and easy to repair. In the ’50s and ’60s, supermarkets and drugstores usually had gumball machines, branded Ford, Northwestern ’60, Toy ’n Joy, Victor, and Oak Acorn. The last of these, Oak Acorn machines, are still made in designs true to the original, by Oak Manufacturing Co., founded in 1948. For beginners, postwar machines are the easiest to start collecting.

Often, sellers don’t have the keys to vintage gumball machines. However, a locksmith can usually make a key for you. Then, inside, you may find treasure. Of course, odds are, you don’t want to try a 50-year-old piece of gum.

But that doesn’t mean it isn’t worth something—the United States has half a dozen serious chewing gum collectors. Extremely rare sticks of gum like Colgan’s Taffy Tolu Chewing Gum can go for hundreds of dollars, whereas more common gum sticks sell for $35 a piece. Also, the coin box could have wheat pennies, buffalo nickels, or mercury dimes inside it.

Antique gumball machines are becoming increasingly rare, so you’re likely to find one with a broken globe or missing parts. Peanut machines, which look a lot like gumball machines, can have damage from the nuts’ salt and oil. Collectors who enjoy restoration often look for globes, chutes, and other usable parts.

Beware of reproductions and vintage machines with reproduction parts like the inexpensive and colorful Carousel brand gumball machines. Look at the casting to see if the item is stamped or marked as a reproduction.

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