For your consideration, here is a West Fest Pinback Button Pin, Dated September, 1994, Holy Rosary Parish, West Seattle, Washington.  It has some wear on it.  There are some tarnish spots on the back of it.  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.  (541.755w-.4px2)