For your consideration, here is a Talkeetna Historical Society Moose Droppings Festival Pinback Button, Pin, from Talkeetna, Alaska.  It may be from 1982, from the 82 on the locomotive.  It has some wear on it.  There is some tarnish on the back.  The button has a diameter of 2 1/4 inches.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (445.806u-.4px2)