Imagine a big green chunk of Bakelite on a tin-plated throne. That's what this buttton is! It measures over two inches across and the Bakelite juts half an inch above the metal platter. Whenever I study this button I always have the same vision of a flamboyant cowboy who sported a whole row of these buttons up and down his cowboy blouse. I was told that the metal base of this button is depressed tin or Mexican nickel. The emerald Bakelite is slick as a jade custard cake. A very unusual button.