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- Letter from a Ford Dealer to Harry Guggenheim regarding an Airmarker on Their Roof, February 5, 1929 - Edsel Ford championed the development of commercial aviation in the United States. As an aid to aerial navigation, he wrote letters to Ford dealers encouraging them to paint two things on each dealer's roof: the name of the city and an arrow pointing due north. More than 4,000 communities had aerial markings of some sort by 1929.

- February 07, 1929
- Collections - Artifact
Letter from a Ford Dealer to Harry Guggenheim regarding an Airmarker on Their Roof, February 5, 1929
Edsel Ford championed the development of commercial aviation in the United States. As an aid to aerial navigation, he wrote letters to Ford dealers encouraging them to paint two things on each dealer's roof: the name of the city and an arrow pointing due north. More than 4,000 communities had aerial markings of some sort by 1929.