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Click to open image viewer. The 24-cent Curtiss Jenny stamp enjoyed many distinctions: not only was it the first U.S. airmail stamp, it was also the world's first definitive airmail stamp, the first ...

New York Times subscribers* enjoy full access to TimesMachine—view over 150 years of New York Times journalism, as it originally appeared. *Does not include Games-only or Cooking-only subscribers.

The "Inverted Jenny," 1918, one of the rarest and most valuable stamps in the world, celebrates the first air mail in the U.S.—by depicting an inadvertently upside-down airplane. Hannah Whitaker ...