This original postcard is from the 1933 Century Of Progress (Chicago World's Fair) which was held in Chicago. It is in very good condition but has slight wear and the front features the "Hall of Science-South Entrance". The reverse side features a postcard format, which is unused and paragragh states " Where the magic of modern science is portrayed this year in Chicago-the Hall of Science at A Century of Progress"measures approx. 5 1/2" x 3 1/2"