Vintage Rowe Vending Gum machine Bubble Gum Old Collective Juicy Fruit Beech Nut

How does a Gumball Machine work

I have checked all four selections and with a nickel it kicks out a pack of gum. This item is in the category Collectibles\Banks, Registers & Vending\Vending Machines\Candy. The barrel lock appears to have been drilled out decades ago.