Cards, roulette wheels, and slot reels hold more than the promise of a game -...

https://wiki-velo.win/index.php/San_Francisco%E2%80%99s_1895_slot-machine_story:_is_there_a_solid_source%3F

Cards, roulette wheels, and slot reels hold more than the promise of a game - they record changing tastes, craft, and chance. In San Francisco in 1895, a small workshop helped shape the slot machine