For your consideration, here is a Vintage America Needs Nixon Campaign Pinback Button, Pin, made by the N.G. Slater Corp, NYC.  It has wear and scratches on it.  There is a lot of tarnish on the back.  The button has a diameter of 3 1/2 inches.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (63.8a11b-.4px1)