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

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

Casino history lives in the objects people handled: marked cards, roulette wheels made for single-zero or double-zero play, and slot reels. An 1895 San Francisco workshop offers a glimpse of how gambling changed in paper and metal.