Proof American Platinum Eagle
Since its introduction in 1997 as an extension of the American Eagle Bullion Program, the Platinum Eagle has become one of the world's most widely-traded platinum bullion coins and is the official platinum bullion coin of the United States. Platinum Eagles are also the only bullion coin guaranteed by the United States Government for weight, content, and .9995 purity. Proof Platinum Eagle coins are struck multiple times to provide a unique finish. The dies used in this process also give the coins a mirror-like appearance, in which the image on the coin appears to be floating over the liquid of the field.