New York City - 1939 NEW YORK WORLD'S FAIR - Aviation Building: The 1939–40 New York World's Fair, which covered the 1,216 acres (492 ha) of Flushing Meadows-Corona Park (also the location of the 1964–1965 New York World's Fair), was the second largest American world's fair of all time, exceeded only by St. Louis's Louisiana Purchase Exposition of 1904. Many countries around the world participated in it, and over 44 million people attended its exhibits in two seasons. The NYWF of 1939–1940 was the first exposition to be based on the future, with an opening slogan of "Dawn of a New Day", and it allowed all visitors to take a look at "the world of tomorrow". This Linen Era postcard, mailed in 1940 with "New York World's Fair" cancellation, informs on the card's reverse: "The Aviation Building is designed to give visitors the impression of their arrival at a large and busy airport. In the central portion will be shown the latest type planes and even the plane of tomorrow. The dome-like rear portion holds an invisibly suspended transport plane with propellers moving as if in flight,. The illusion projected is created by projection of moving clouds and night effects against the curved background. At the floor level will be exhibits. The Architect is William Lescaze with J. Gordon Carr as associate." The card, mailed in 1940 with "New York World's Fair" postal cancellation, is in good condition. CT Art Colortone. Curt Teich Co., Chicago. No. 5A-H1619. Frank E. Cooper. New York, NY. The card is in good condition. No. 19W.