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