The Vintage Postcard from 1907 features an optical illusion of a shadow hat trick, making it a unique and entertaining collectible item. This printed postcard from the United States measures a standard size of 5.5 x 3.5 inches and is made of paper. The optical illusion adds an extra layer of interest to this original postcard, making it a fun and nostalgic piece for any postcard collector or enthusiast of vintage memorabilia.