Philadelphia, Pa. Advertising Covers. 6 covers; each franked with 1851, 3¢ dull red tied by Philadelphia, Pa. cds, 5 with blue embossed cameo ad cards including Girard House, manufacturers including saddlery and carriage, other with allover Saturday Evening Post ad on reverse, F.-V.F. overall. Scott No. 11  Estimate $300 - 400. $0 (Image)