1.5" with covered metal back and fixed vertical bar pin but no maker name. Pictured is Bostock known as the "Animal King" who appeared across the country during the early 1900s including Coney Island, New York City and world's fairs such as Buffalo. He is surrounded here with ten different animal photos including lions, tigers, leopards and at the top an elephant. We've seen only about six of these over the years. Exc., displaying Mint.