2.25" with tin covered back and fixed vertical pin by St. Louis Button Co. This is a real photo button without dot pattern and large text reads "Compliments Of The Aerial Stuarts." Apparently pictured are husband, wife and their young boy. Each photo is captioned with the person's name. The boy is "Ernest Stuart." The father is captioned as "The Aerial King Prof. O.K. Stuart." The wife is captioned (but hard to read without magnification) "Amelia Stuart." Exc. and displays Mint. First we've seen. Morry Greener Collection.