Camouflaged American WWI helmet with unknown transport corps insignia.

I've wanted a camo helmet for quite a long time, and was able to get one recently. It cleaned up exceptionally well, considering that it was found in a barn!

I've asked quite a few people about the insignia and it's hard to decide between rail transport and some kind or motor transport.

Still has the liner and chinstrap, which is a plus. The last picture is one I took when I was cleaning, I apologize for the blurry quality.