Gentex SPH-4 Helicopter Pilot Flight Helmet. Item is listed as used. The item "Cold War Era US Army Gentex SPH-4 Helicopter Flight Helmet Military Pilot Helmet" is in sale since Friday, July 12, 2019. This item is in the category "Collectibles\Militaria\Surplus\Hats & Helmets".The seller is "prestigespringhill" and is located in Spring Hill, Florida. This item can be shipped to United States.