1879, 5¢ blue, horizontal pair, in combination with 1879, 3¢ green, horizontal pair on illustrated ad cover to Roxbury, Mass., showing Street & Storefront Scene with Patent Medicine Ad Billboard, reverse with Mohawk Hotel cachet handstamp, Very Fine; with 2013 P.F. certificate. Scott No. 185+184  Estimate $400 - 600. $0 (Image)