Original U.S. Vietnam War Helicopter Pilot Gentex SPH-4 Helmet Dated 1971 - Size X-Large Technical Books It uses several technologies developed

It uses several technologies developed within Israel

signal corps and supply units used a version which had no chin-strap

Such an expedition also had the potential of taking control of the Swedish mines and opening up the Baltic for the Allies

however the leather is dried and stretched out

• Photograph of sketch Kurek in uniform

Original U.S. Vietnam War Helicopter Pilot Gentex SPH-4 Helmet Dated 1971 - Size X-Large Technical Books It uses several technologies developedOriginal 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