Postal Card, 1920, 1¢ on 2¢ Red on Cream, Die 2, bright color, fresh and immaculate, Extremely Fine; with 2015 P.F. certificate. Scott No. UX31  $4,250. A RARE EXAMPLE OF THE WASHINGTON D.C. ONE-LINE BLACK SURCHARGE. The Washington D.C. one-line surcharge is one of the rarest non-error United States postal card surcharges. This experimental overprint prepared by the Universal Company and deemed to be unsatisfactory with only 2000-3000 were sold before being withdrawn. $0 (Image)