Usn H-4 flight helmet, liner and goggles. See all pics as there are many flaws. The item "Gentex H-4 USN Flight Helmet Korean War" is in sale since Tuesday, September 12, 2017. This item is in the category "Collectibles\Militaria\Korea (1950-53)\Original Period Items".The seller is "voltageman-7" and is located in Martinez, California. This item can be shipped to United States.