1899 National Export Exposition. All over multi-color Expo. advertising on two covers each franked with 2¢ Bureau Issue (one with trivial wrinkle) tied by two different type Expo. Slogan cancels (Bomar P99-09 & P99-10), one with Expo. label tied on reverse, Extremely Fine and attractive, one of the most beautiful Expo. designs known. Estimate  $300 - 400. $0 (Image)

1899 National Export Exposition. All over multi-color Expo. advertising on cover franked with 2¢ Bureau Issue (small defect) tied by Expo. Slogan cancels (Bomar P99-09), reverse with lovely all over advertising design for the "Lentz's Formaldehyde Gas Generator", slightly reduced at right, Extremely Fine and choice, an interesting cover with all over design on front & back. Estimate  $100 - 150. $0 (Image)