For your consideration, here is a Vintage 1955 Southwest Washington Fair Pinback Button, Pin, No. 2671, Dated August 24 - 28, 1955, Chehalis, Centralia Interest.  It has some wear and scratches on it.  There is tarnish on the back of it.  The button has a diameter of 1 1/2 inches.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (483.757h-.4px2)