Exposition Cover Balance. Over 30 better covers and cards; including 1876 Philadelphia Centennial including postmarks and illustrated covers, scarce postal cards, Yale Lock handstamps, rare 1884 Sou. Exposition Station, Louisville, Ky. postmark, World Columbian Expo items, 1897 Tennessee Expo, Omaha, Neb postal card envelope usage, and many other Expositions included, also 1899 National Export Expo tickets; many scarce items, well worth careful evaluation. Estimate  $2,000 - 3,000. $0 (Image)