The box is cut and scored, breaks out of a frame on a single sheet. You fold it, glue it, and add two pieces of gum, then seal it up. About the only gum that will fit is the Canel's Chiclet-size gum, and with the Dentyne and Beemans, you can use Trident or if you can find the original Dentyne gum, that will fit in those.
Slowly building a knowledge base on E2000 series Bally machines and J400 Jennings. Started with the antique Mills and Jennings. Getting there...