DuPont Balance Lot. Lot of two advertising cover & four postcards, covers include 1918 usage with 3¢ Washington-Franklin & 10¢ Special Delivery with multicolor Dog & Mallard design, 2nd cover shows multicolor design of Monora-1910 Champion, cards show two different factories & two view of the Centennial of the Powder delivery to Comm. Perry, both covers reduced affecting stamps, `, Fine. Estimate  $100 - 150. $0 (Image)