For your consideration, here is an I Rode It! Magic Mountain's Colossus Souvenir Pinback Button, Pin, The Greatest Rollercoaster In The World.  It has some wear on it and some light spots under the finsih.  There is a little tarnish on the back.  The button has a diameter of 3 inches.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (573.28g-.3px2)