It looks a lot like an Adrian helmet, even the chinstrap-attatchment buckles are near identical to Adrians I've seen.
Though there are differances. For one it's made of brass, and I've never heard of Adrians' being made of that. It also has the "ordinance" symbol found on a lot of Adrians, though it's small and on the crest, rather then large and on the skull.
It also has a holder for a feather on the left side. There was a large originaly white (now green/gray) feather thrust into the feather folder. (Which I keep elsewhere now)
I heard it could be a military fire-fighter helmet, though the feather holder doesn't really make sense for that to me.
There is also a name/word stamped in the back of the helmet in little letters, though they're corroded and indecipherable.
Here are some (low resolution) images I just took.
Thanks for any help.



