This is a rare 1st Day Issue stamped envelope from the United States in 1952, honoring NATO. The envelope features a 3 cent denomination and is in mint hinged quality. The color of the envelope is white and it has not been graded. It is also an un-certified item with a cancellation type of First Day of Issue. The place of origin is the United States. This is a great addition to any stamp collection for those interested in NATO and United States postage history.