I've had this one for a long time. It is a front seam swivel bale with a heat stamp of 98F. It was later used in the Korean and/or Vietnam war, due to the clipped on chinstraps. I added the liner, which is dated 1953.
A very interesting piece to me because I have never seen another sand camouflaged US helmet.
I am not sure what the white stuff on the front of the helmet is, any thoughts on that?
Lots of pictures, thanks for looking!