Jean-Pierre Mangin describes the plane on this stamp as "anachronistic and is not Richard Byrd''s" in his book, Guide Mondial des Timbres Erronés, Yvert & Tellier, vol. 2, p. 282. M. Mangin's identification is based on an incorrect premise. The stamp commemorates Byrd's flight over the Antarctic in 1929. That flight was made in the plane named the "Floyd Bennett," a Ford tri-motor, not the North Pole flight in 1926 which was made in a Fokker Trimotor, "Josephine Ford," flown by Floyd Bennett.