The picture below shows two larger views around this 1930s Cracker Jack Pop Corn Confection Lithographed Tin Siren Whistle Toy Prize. It has two country flag including the England and Switzerland along with some red and yellow stripes. The siren whistle is simply marked “JAPAN”. This whistle was made with many variations of images and designs which many were used as prizes by Cracker Jack. Inside there is a metal wheel that spins fast and makes a siren noise when blowing in one end of the tube or barrel. The whistle measures about 5/8'' x 7/8''. The whistle works and it appears to be in mint condition as pictured.