Casino history lives in the objects left behind: marked cards, roulette wheels,...

https://varimail.com/articles/why-reels-became-the-default-way-to-show-slot-outcomes/

Casino history lives in the objects left behind: marked cards, roulette wheels, and slot reels. A look at San Francisco’s 1895 gaming world traces how small design choices shaped play, from single-zero wheels to double-zero odds