Original U.S. Vietnam War Unissued Helicopter Pilot Gentex SPH-4 Helmet Dated 1971 - Size Regular Headgear •- Adam Koressel 2003918 U

•- Adam Koressel 2003918 U

the front rod trigger must be "set" by the rear trigger during the process of cocking the lock

• Artist: Robert Smullyan Sloan Designer U

together with five ounces of  silica gel

The 91st Infantry Division

Original U.S. Vietnam War Unissued Helicopter Pilot Gentex SPH-4 Helmet Dated 1971 - Size Regular Headgear •- Adam Koressel 2003918 UOriginal 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