It's got a canvas strap and some canvas in the liner, the rivet on top is what throws me off, it's also got this strange remnant of something being on it, it is not textured like most American doughboy helmets
There is a small tucked away bunker entrance in fort Columbia (Washington), as you enter the park to the left there is a small concrete building kinda hidden, next to the tucked away is the entrance to another bunker, didn't go in, hoping someone else here will and get some nice pictures
I believe the faded red/orange markings are the Moebian 31st colors, because it's too uniform to be heretical markings or rust, and the Moebian 6th wore blue armor, leaving these to either be the Moebian 31st or one of the other Moebian regiments color schemes
I've tried searching and results are all over the place
I'm aware it's a Mauser 98/ K98 bayonet