(Cameo) Silas C. Herring & Co., green illustrated cameo corner card showing Herring's Patent Champion Safe, on cover franked with 1857, 3¢ dull red, two vertical pairs tied by light New York cds's, reverse with large blue illustrated cameo ad showing Building Scene with L.L. Covert impint, Very Fine. Scott No. 26  Estimate $150 - 200. $0 (Image)