Jim, thanks for all your help. I bought a used headband with the black clips off Ebay and the chin straps for the helmet that you previously found for me. After cleaning the helmet yesterday with some light oil and wiping it down I find a Large "S" stamped in the metal on the inside just behind the brim and a little further in theres "2 8A". No other marks that I could see. The bails/bales are the swivel type.

Inside the liner, what I thought was a "W" is actually " M II " with a larger numeral "3" above it. With the 64 P or F stamped in ink on the lining I'm assuming its a VN era.

I'll take some more pics sometime today and try to post them. My prob with posting is that when I download the pics to my computer, my pic files are so mixed up, when I try to find them to attach sometime I can never find them! One of these days I have to organize the pictures! Its on my roundtuit list.