The picture shows two close views of this 1957 Quaker Cereal Toy Premium / Prize Siren Whistle Crazy Ring. This ring was a prize offered by Quaker Oats Cereals in 1957. It has a metal siren whistle on top that works great. There were others available and they can be found in my other items right now. This one is in good condition. It has some rust spotting on top as can be seen in the scan below. It measures 1" tall.