Original Vietnam era Flight Helmet. USAF double visor 68 dated. One of a kind listing, what you see is what you get. Thanks for shopping NCHSinc. Inside Rack 23, Shelf T. The item “Fl-9 Vietnam era USAF Flight Helmet original unit 481 double visor 68 IR23T” is in sale since Wednesday, March 11, 2020. This item is in the category “Collectibles\Militaria\Vietnam (1961-75)\Original Period Items\Hats & Helmets”. The seller is “nchs” and is located in Springfield, Virginia. This item can be shipped to United States.