Original U.S. Vietnam War Helicopter Pilot Gentex SPH-4 Helmet - Size Regular Military Audio It has clear makers marks

It has clear makers marks on the canvas hoist

when a decision could not be made

C) Melvin J

This was to counter the already tested existing civilian lorries which had poor performance in the field

Original U.S. Vietnam War Helicopter Pilot Gentex SPH-4 Helmet - Size Regular Military Audio It has clear makers marksOriginal 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, earphones, microphone, and tint visor. The helmet is marked Regular This is a rare Vietnam War 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