Dont get excited i dont have one,but i saw this on TV today.
It was in the television series "Who Do You Think You Are"
It was about Martin Shaws Grandfather who was in a Search Light Battallion in Birmingham and in the footage was this Anti Aircraft Gunner apparently in Britain with a Camo Helmet.
I just thought you might like to see it and maybe compare if one pops up
There are a couple of other flashed helmets in the scene,if you get a chance to see it.