Offices in China, 1922, 4¢ on 2¢ carmine, "SHANGHAI" omitted. Top horizontal pair in a top margin block of 4, full o.g., wide margins, bright color, some hinged reinforcements and natural paper wrinkles affecting right pair, still Very Fine, a magnificent and unique multiple of this exceptionally rare overprint variety, ex Canman, Drucker; with 1982 P.F. certificate. Scott No. K18a  Estimate $20,000 - 30,000. $0 (Image)