Original U.S. Vietnam War US Navy Pilot Dual Visor APH-6CMSI Flight Helmet by Sierra Engineering Co. with Original Early “Bowling Ball” Bag MP 34 On the 3rd of Feb

On the 3rd of Feb

and seldom seen

made for the M-1860 Dreyse Needlefire Fusilier Rifle

It was about 3:45 - 4:00 p

Both the chin strap attached to the outside of the helmet and the napestrap had very limited skin contact and therefore very little retention capability

Original U.S. Vietnam War US Navy Pilot Dual Visor APH-6CMSI Flight Helmet by Sierra Engineering Co. with Original Early “Bowling Ball” Bag MP 34 On the 3rd of FebOriginal Item: Only One Available. At the end of the 50's the APH series helmets introduced a new generation of flight helmets characterized by the external visor covered with a protective shield. Improvement of the communication system, internal liner and oxygen mask retainers was also made and in some versions the dual dark and transparent visors system was installed. These types of helmets were the US Navy and USMC standard jet aircraft headgears