Original U.S. Vietnam War Helicopter Pilot Gentex SPH-4 Helmet - Size Extra Large Resin Guns and Grenades well during the mid 1930s

well during the mid 1930s the Germans developed the famous MG 34 Machine Gun

in Des Moines

augmented by British

and was probably changed during the later bolt conversion

Read about it at this link

Original U.S. Vietnam War Helicopter Pilot Gentex SPH-4 Helmet - Size Extra Large Resin Guns and Grenades well during the mid 1930sOriginal 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, visor, microphone, and tint visor. The helmet is marked X Large This is a rare Late Vietnam War era original rare 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