Johnston & Dow, Manufacturers of Ammunition, corner card on yellow cover to Washington D.C. bearing three 1¢ blue (63) singles, two with nat. s.e., tied by two strikes of 10-Blade Patent Cancel (Skinner-Eno PN-A 3) duplexed with "New-York Oct 20 1862" cds; flap tear, unnoticeable stamp tear, Very Fine. Estimate  $300 - 400. The cutting into the stamp paper by the patent cancel blades can be easily seen. $0 (Image)