For your consideration, here is a 1994 Seattle Seafair Clowns Pinback Button, Pin.  It has some wear and there are rust spots under the finish.  It has tarnish on the back of it.  The button has a diameter of 2 1/8 inches.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (542.754t-.4px2)