One of the smallest trade stimulators, an early 1940's Groetchen IMP. A one cent 3 reel slot disguised as a gum ball radio. Not sure how well this threw off the Feds, but they did make a lot of them. This one has the cigarette reels where you need to match three to win (an early grave). The radio dials flip over the reels so, "hey we're just listening to the big game on this gumball machine".
Added a pic of one in the wild.
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