Original U.S. Vietnam War US Navy Helicopter Combat Support Squadron 9 Gentex SPH-4 Helicopter Helmet - HC-9 U.S. Militaria Last regular version in service

Last regular version in service with the British Army

and there is also a faint RBNr

with strong bluing present on most of the barrel and fittings

that if the one that a collector was examining for originality did not conform to the dimensions of an original example

Original U.S. Vietnam War US Navy Helicopter Combat Support Squadron 9 Gentex SPH-4 Helicopter Helmet - HC-9 U.S. Militaria Last regular version in serviceOriginal Item: Only One Available. Helicopter Combat Support Squadron 9 HC 9 flew the HH 3A Sea King and during its existence was the only US Navy squadron whose mission was to provide Rescue and Recovery of Aircrews in a hostile environment and Insertion and Extraction of Special Forces wherever needed. From 1990 their mission was assumed by HSC 4 and HCS 5. This is a United States Helicopter Flight Helmet type SPH 4 made by Gentex. This is an early