1919, 1¢ Gray Green Offset, Perf 12½, Imperf Vertically, horizontal pair, o.g., very lightly hinged, strong bright color, Post Office fresh, Extremely Fine, a rare and undercataloged variety; with 2004 P.F. certificate, Colman guarantee handstamp. Scott No. 536a  $1,350. $0 (Image)