Casino history lives in the objects people handled: playing cards, roulette...

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

Casino history lives in the objects people handled: playing cards, roulette wheels, and slot reels. An 1895 San Francisco machine offers a close look at the mechanics behind familiar games, including the difference between single zero and double zero.