I obtained this helmet in this strange combination. The helmet shell is post war, looks eighties or maybe seventies, but what made me happy is the liner. I will show pictures in my next articles. part 2 and part 3 See the liner? Recognize the inside of the liner? I removed the head band, shown in a separate picture below.
I found the heat stamp 8723
HEADBAND HELMET DSA-100-76-C-1076 = made in 1976 NSN 8470-00-153-6671 Steinberg Bros Inc"