Flight Helmet, Gentex H-4, US Navy, US Marine Corps 1950's B-50 to correct the altitude reading

to correct the altitude reading as required

it serves no other function and requires no other radar in the aircraft

If either of the two glass lenses were shattered during a firefight

It is in reasonable condition given its age

F (fighters) and G

Flight Helmet, Gentex H-4, US Navy, US Marine Corps 1950's B-50 to correct the altitude readingHere is an Flight Helmet made by Gentex, type H 4, size Medium, used by pilots of the US Navy and US Marine Corps Aviation during the mid 1950's. According to Andrea Salimbeti's website: The {Gentex} H 4 was a further development of H 3. The rigid shell with reinforcing ridges, in different shape respect to the H 3 model, is constructed of a fiberglass cloth reinforced with epoxy resin. Also for this model a cloth inner helmet which incorporate the