No need for the application of M2 ball. I think the threat is terminated.

I know what the US Ordnance Corps emblems are...I just didn't make it clear what I was talking about in the OP. I meant the national colors on the helmet. Just wondering if it had any significance to a particular unit. But, that was a great website...lots of interesting info and confirms to me (at least I think so) that this is what is referred to as an M35 (or double decal) helmet from the 1935 - 1937 time frame.

Pretty interesting stuff.