Original 1929 Ford Tri-Motor Airplane Ad Proof. This Ad Proof would have been sent to Ford by the Magazines or Papers that ran this Ad, these include Wall Street Journal and Boston News Bureau. This Ad highlights the Ford Tri-Motor Plane making Air Travel from New York to Los Angeles for $339 possible. It is in good condition with minor wear, blemishing and discoloration [see photos]. It is printed on newspaper style paper and is creased in middle from being folded in half. Very rare piece that will make a cool framed display item.