For your consideration, here is a 1983 Huskies Beat Mich - Again Football Game Pinback Button, Pin, Dated September 17, 1983, U of W, Michigan Sponsored by Kentucky Fried Chicken and Coca Cola.  It has some wear on it.  There is some tarnish on the back of it.  The button has a diameter of 3 inches.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (478.751e-.4px2)