 | The World's Rarest Stamps Proof Coin Collection And Display. The World's Rarest Stamps 24K Gold-Plated Proof Coin Collection Featuring Images Of Some Of The Most Collectible Stamps Throughout History - A century ago in America, the very first regular airmail flights were set to begin on May 15,1918. In their honor, a special 24-cent, airmail stamp was rushed into production. The stamp showcased a blue Curtiss JN-4 biplane (nicknamed "Jenny") within a red frame. However, on just ONE sheet of 100 stamps the airplane's image was shown upside down. Today, these... - The World's Rarest Stamps Proof Coin Collection And Display. |
