Exposition Balance Lot. Small lot of two covers from the 1876 Centennial Exhibition, one with Centennial postmark on cover with imprint of the United States Centennial Commission, other with blue cameo corner card on back flap showing Expo building, plus two cards from the Columbian Expo, two covers from the Pan-Am Expo, one each of the St. Louis, Jamestown, one real photo card of Alaska-Yukon Fair Grounds with Expo cancel, mixed condition. Estimate  $300 - 400. $0 (Image)