On October 2, 1933, the Century of Progress airmail stamp, affectionately known as “Baby Zepp” was issued. In the 1920s, Germany’s Luftschiffbau Zeppelin company offered to build the US a dirigible as payment for debt from World War I. America agreed, with the stipulation that the airship had to prove itself in a transatlantic journey. On October 16, 1924, the LZ 126 arrived in New Jersey. This was the start of Graf Zeppelin flights between the US, South America, and Europe, with mail carried to all stops along the way.