The Steelers. The emblem appears on one side only.
I would agree with that.
However, the trivialist who showed me this says it has to be different, which the Steelers helmet is, but he means some kind of logo on the other side that is different.
He says its the K.C. Chiefs.
Update: Trivialist writes:
Here's how it's different.Look at the pictures of the helmet that I sent. On the left side of the helmet, the flat end of the K is nearest to the pointy end of the arrowhead. On the right side, the flat end of the K is nearest the flat end of the arrowhead. This is where the similarity but difference is between the 2 sides.
No other team has ANY difference. They are either mirror images or reversed images (as in the case where there is letters or a name: IE Raiders, Jets, Giants).
