Here you have a WONDERFUL VINTAGE piece of BRUSSELS WORLD'S FAIR MEMORABILIA. Please...SEE THE SCAN! This is the envelope and cachet and cancelled stamp for the First Day of Issue of the U.S. BRUSSELS WORLD'S FAIR PAVILION 3 CENT U.S. Postage stamp. The cachet is an image of MAIL CIRCLING THE GLOBE. The stamp was cancelled at DETROIT, MICHIGAN ON APRIL 17, 1958! The envelope measure 6.5 inches X 3.5 inches and this is in nice shape. Take it home with you! GOOD LUCK! Please Check Out My Ebay Store for more great memorabilia! I am happy to send this to any country. 1st class air postage will be charged… More excellent packaging and FREE SHIPPING here in the United States! THANKS!