US Doughboy WWII

I bought this helmet recently and would like to know what year it is and anything people know about it.

Thanks

The only way to tell what year the Brodie pattern helmet was is if it has a date stamp on the inner rim.

Try here for some more information as they have lots of hints and clues to look for.

http://www.quanonline.com/military/military_reference/helmets/brodie.html

it only has 9C on the rim no other clear numbers. theres a serial number written on the liner but its in pen