The picture below shows larger top and bottom views of this Colorful Old Cracker Jack Pop Corn ConfectionLithographed Tin Toy Prize Bird Whistle. The whistle is not dated but it is believed to be from the 1950s. It is not marked and the maker is unknown. The prize whistle measures about 1-3/8'' x 1-1/2'' x 1/4''. It appears to be in near mint condition as pictured.