Cards, roulette wheels, and slot reels carry casino history in their materials...

https://elliotsinspiringblog.scriblorax.com/posts/animated-reels-vs-mechanical-reels-what-s-the-real-difference

Cards, roulette wheels, and slot reels carry casino history in their materials and mechanics. A closer look at single-zero versus double-zero roulette shows how one small design choice changed the odds and shaped the experience of play.