For your consideration, here is a Western Airlines The Great New Way Nonstop To Washington, D.C., Billings, Spokane, Milwaukee Pinback Button, Pin.  The button has a diameter of 3 inches.  It has a little wear on it.  There is some tarnish on the back of it.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (694.7c15c-.3px1)