Original U.S. 1950s Navy USN Gentex H-4 Flying Helmet with Oxygen Mask and Internal Summer Flight Helmet Antique Long Guns The body is non-magnetic manganese

The body is non-magnetic manganese steel

The pages are sturdy paper

The rim of the bell is 5" across and is clearly stamped:

It was decided that the FSSF would be blooded against Japanese forces occupying islands off Alaska

Original U.S. 1950s Navy USN Gentex H-4 Flying Helmet with Oxygen Mask and Internal Summer Flight Helmet Antique Long Guns The body is non-magnetic manganeseOriginal Items: Only One Available. This is a very nice 1956 1964 USN size LARGE Gentex H 4 helmet that comes with Medium size Type MS 22001 Oxygen Mask and a Large Summer Flying Helmet by General Textiles Inc. Helmet features original gold and green paint with USN USMC Aviator wings to front. All parts are in good condition. This is a very nice display set! The H 4 features a rigid shell with reinforcing ridges and is constructed of a fiberglass