New York: 1991. unbound. Lithograph signed "Hirschfeld" in pencil depicting the four chiefs of the United Nations Postal Administration (Hugo Valdes, Chief of the Geneva Office; Anthony Fouracre, Chief; Richard Winter Tourou, Chief of the Vienna Office; Rita Fernando, Chief of the New York Office). No. 171 of 500 signed and numbered lithographs created for the World Foundation of the United Nations Associations. Includes Documentation Certificate. 11 x 8.5 inches, New York, October 24, 1991. Fine.