Original U.S. Vietnam War Unissued Helicopter Pilot Gentex SPH-4 Helmet Dated 1971 - Size Regular Ancient a symbol dating back to

a symbol dating back to the Ottoman Siege of Vienna in the 1680's

left an iron bolt-eye extending past the muzzle crown

but this would depend on how the soldier who owned this would fight with a knife

graduated from 200 to 2

The frame and barrel were changed to anodized "Duralumin" alloy

Original U.S. Vietnam War Unissued Helicopter Pilot Gentex SPH-4 Helmet Dated 1971 - Size Regular Ancient a symbol dating back toOriginal Item: Only One Available. This is a United States Helicopter Flight Helmet type SPH 4 made by Gentex. The helmet is in overall excellent, complete condition with the liner, headset, tinted visor and boom microphone. This is a rare Vietnam era original helicopter helmet in wonderful complete condition! The Sound Protective Helmet 4 (SPH 4) is a derivative of the US Navy SPH 3 and was used by the US Army since 1970. The SPH 4 is a single visor