Original U.S. Vietnam War Era APH-5 Helicopter Pilot Flying Helmet by Sierra Engineering Company - Size Medium Century but they later moved to

but they later moved to other hotels in Saigon

Light grain on blade is visible on the blade flat (ji)

In Operation Market Garden

82-inch caliber

The insignia shows no signs of having been sewn onto a flag

Original U.S. Vietnam War Era APH-5 Helicopter Pilot Flying Helmet by Sierra Engineering Company - Size Medium Century but they later moved toOriginal Item: Only One Available. This is a solid example of a Vietnam War APH 5 Flying Helmet, as used by all branches of service during the Vietnam War. This Helmet appears to have been very well used, and repainted multiple times during its period of service. Has a functional clear visor as well as boom mic and issued hearing protection. Size is a MEDIUM and overall condition is very good. There is an original manufacturers label is still present