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.