Japan's garapon lottery wheels

The Garapon (/ Gara-pon) is a hand-cranked rotary lottery machine used for promotions and raffles. I hadn't seen a garapon (pictured) until I came to Japan, but they are ubiquitous in Japanese shopping streets, stores and event venues. 

The garapon works by turning a handle, which spins an internal drum containing small, colored balls. When you turn it one ball randomly falls out into a small saucer, creating a "pon" sound, hence the name. There are different color balls in the drum of the garapon and they correspond to prizes. The color of the ball corresponds to a specific prize tier, for example, gold might represent the top prize while white is for a consolation prize. A hand bell  is often rang when someone wins something more than the consolation prize.

Garaphon are used for fun, low-stakes events throughout the year. Have you seen them during your time in Japan? Moreover, have you had the joy of turning one!? If so, did you win anything good?