For your consideration, here is a 1995 University of Washington vs. Arizona Football, The Duel In the Desert Pinback Button, Pin, from the October 21st game. It has some wear and scratches on it. The diameter of the button is 2 7/8 inches. Item pictured is the actual item up for sale and comes from a non-smoking household. (260.310a-.4px)
[Thanks for looking!]