This is a stunning block of 10 stamps, issued by the United States in 2001. It celebrates Legendary Playing Fields and depicts the following baseball stadiums: Ebbets Field in Brooklyn, Tiger Stadium in Detroit, Crosley Field in Cincinnati, Yankee Stadium, Polo Grounds in New York City, Forbes Field in Pittsburgh, Fenway Park in Boston, Comiskey Park in Chicago, Shibe Park in Philadelphia and Wrigley Field in Chicago. It is Scott catalog #3510-9, and is mint never hinged.