1899 National Export Exposition, Philadelphia, Pa. A nice balance lot of covers with Expo. cancels & advertising, Expo. cards, etc., included is three 2¢ Postal entire with Expo. Station Numeral "2" duplex cancel, a nice range of Barry Slogan machine cancel, as well as numerous American machine flag cancels, plus 12 Expo. postcards (mixed mint & used) printed by Gatchel & Manning (Megson GV160, cat. $75 each), plus a very unusual mint Expo. Illustrated advertising lettersheet made by the Universal Envelope Mf'g Co. four stunning multi-color illustrated Expo. covers, etc., mixed condition, inspection is a must! Estimate  $750 - 1,000. $0 (Image)