US M1 fixed bale helmet with Sergeant insignia

Scarce original US M1 helmet by McCord with Firestone liner. The outer shell is nicely wartime personalized with subdued black Sergeants insignia on the front of the helmet. The shell and strap is marked with the laundry number Z-4794. The back of the shell has numerous stress cracks. The Sergeants helmet insignia is very scarce to find on a helmet!