Original U.S. Vietnam War APH-5 Helicopter Pilot Flying Helmet Likely by Sierra Engineering Co. - Incomplete Japanese Uniforms There are no markings indicating

There are no markings indicating the size of the eagle

661 Tank Destroyer Battalion

the receiver is marked bpr / 104 / PJ

The engine used was the twin-row Wright R-2600-20 Twin Cyclone fourteen-cylinder radial engine

The brass buckle has a lovely mellow patina

Original U.S. Vietnam War APH-5 Helicopter Pilot Flying Helmet Likely by Sierra Engineering Co. - Incomplete Japanese Uniforms There are no markings indicatingOriginal Item: Only One Available. This is an incomplete 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 retains its straps but is missing the microphone and the interior padding. Has a functional clear visor and is likely a size large. The original data tag is either under the styrofoam or gone, as we could not find it. But from other