1899 Greater America Exposition Postcard Envelope. Outer envelope for set of 10 cards with various views of the Exposition (Megson GF110) published by U.S. Postal Card Co., franked with 2¢ Bureau Issue tied by Omaha, Nebr. machine cancel, cover with small corner fault at bottom right, Very Fine, a very rare envelope which is unlisted in Bomar. Estimate  $150 - 200. $0 (Image)