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 Safety of the Ford Tri-Motor Plane and Colonel Halliburton's Southwest Air Fast Express use of them. It is in good condition with minor wear 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.