This paper model is a Roulette, a casino game named after a French diminutive for little wheel, this paper toy is designed by Canon Papercraft. In the game, players may choose to place bets on either a single number or a range of numbers, the colors red or black, or whether the number is odd or even.
To determine the winning number and color, a croupier spins a wheel in one direction, then spins a ball in the opposite direction around a tilted circular track running around the circumference of the wheel. The ball eventually loses momentum and falls on to the wheel and into one of 37 or 38 colored and numbered pockets on the wheel.
You can download the canon papercraft model here: Canon Papercraft - Roulette Free Paper Craft Download