Slots have come a long way since Charles Fey’s original three-reel machine....

https://blogfreely.net/teresa-long85/h1-b-mills-slot-machine-size-compared-to-a-smartphone-a-mid-century-classic

Slots have come a long way since Charles Fey’s original three-reel machine. Remember Bally’s Money Honey? It was the first electromechanical slot that changed the game forever