This original postcard is from the 1933 Century Of Progress (Chicago World's Fair) which was held in Chicago. It is in excellent condition & slightly yellowed and the front features the "Rocket Cars Crossing Lagoon, Chicago World's Fair". The reverse side features a postcard format, which is used and has a "Century Of Progress" Cancellation and a paragraph that says "Here is the supreme thrill of a lifetime-a ride on the Sky Ride, an unequalled view of the Fair Grounds and the City of Chicago from rocket cars suspended beneath the rails" and measures approx. 3 1/2" x 5 1/2".