World War II Advertisement - National Tube Company

Will The Helicopter Be Our Most Versatile War Bird - World War II era black and white advertisement for National Tube Company, has a photograph of a helicopter hovering over the ground with a man on the ground holding a string that is tied to the helicopter, in the middle there is a smaller photograph of different Shelby seamless aircraft tubing, at the bottom another photograph of a helicopter hovering over the ground and a man tightening the flotation devices that are attached to the bottom of the helicopter. McGraw-Hill Publishing Company, Albany, New York