Need help in identifying these flight helmets.

[STURM]

Is anybody able to indentify the manufacturers of these 3 flight helmets? The photo on the left is of a Hornet pilot and the other 2 are S-61 pilots/crew. Thank you.

 

[Gremlin29]

Is anybody able to indentify the manufacturers of these 3 flight helmets? The photo on the left is of a Hornet pilot and the other 2 are S-61 pilots/crew. Thank you.

I'm not sure about the middle pic but the other two are Gentex helmets, they've about had the market cornered on US military flight helmets for a long time.

 

[STURM]

Gremlin29, are you able to identify this helmet? Its definitely not a Gentek and was taken in the 1970's.