Liberia, 1941, 50¢ on 1¢ Green, First Flight Liberia - U.S. O.g., never hinged, well centered, fresh with strong color, Very Fine, an attractive and choice never hinged example of this great Liberian Airmail Rarity; signed Sanabria, with 1986 A. Rendon certificate. Scott No. C17  $3,000. $0 (Image)