Let me start this one off by saying that this is not my helmet. It belongs to my anthropology professor. Upon starting a conversation with him about WWII, he told me that his father was in the 104th Infantry Division, and that he still has his father's helmet! Of course, I asked him to bring it in. After weeks of forgetting, he finally remembered it today.
The helmet is a McCord fixed bale with a heat stamp of what looks like '93A'. The chinstraps and brass hardware are early as well. The liner looks like it came a bit later, but it is a Westinghouse with a green buckle chinstrap and a full sweatband. Both the shell and the liner have 104th I.D. and 414th I.R. insignias on the sides. The liner decal is typical of those I have seen on 104th I.D. liners.
The story is that this helmet belonged to my anthropology professor's father- Silver Star recipient and radioman, Sgt. Adrian L. Davies, of the 414th Infantry Regiment, 104th Infantry Division. Sgt. Davies brought the helmet back with him (which he repainted in Germany, by the way), and it eventually found itself being used as a prop in my teacher's army games as a child.
I only had my phone on me today, so the pictures might not be the best. Enjoy!