M1917 helmet?

[B105FA]

A friend of mine questioned whether it is British. I doubt it since it was made in Pittsburgh, Pa. by Acme Protection. I say it's some sort of construction/miners type lid.

 

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[nhbenz]

Here is a brief discussion about this type, which points out that the liner is different that that of the Brodie helmets:Police Marked Steel Helmet - STEEL AND KEVLAR HELMETS - U.S. Militaria Forum
So, as you're suggesting, likely not for US military use. And as of yet I haven't seen that Acme was a supplier to Britain during WWI (as I think you know, noting that you're well versed in these from past discussions).
But the Brodies are still in use today in parts of the world, leaving a long span... I don't think I'm helping

 

[Retired Sarge]

Sounds like a Civil Defense helmet. I can not get the smaller pictures to open in order to see the liner. The Civil Defense ones have a deeper bowl than the military ones.

 

[B105FA]

The liner is similar to the aluminum parade helmets used after WW1. Sorry about the pics. I see from nhbenz that it was used by the police.

 

[B105FA]

Very good nhbenz. It was used for police units. Those are certainly the same with the markings and liner. Thanks for the good eye and memory.