This set commemorates the 10th anniversary of the American Eagle Platinum Coin Program. The proof version of the American Eagle Platinum Coin features a cameo image floating on a mirror-like background and the first-time offered reverse proof version of the American Eagle Platinum Coin features a frosted background and an enhanced brilliant, mirror-like finish on the raised elements of the coin. This is an enhanced reverse proof version because it is not an exact opposite polish of the regular proof version. The design elements on the enhanced reverse proof platinum coin were strategically selected to feature the proof, mirror-like finish in contrast to frosted background design elements to enhance the entire image. NGC is highly respected as one of the leading grading services in the nation and the official grading service of the American Numismatic Association (ANA). Each coin has a diameter of 27mm and a face value of 50 United States Dollars. ** Serial number will vary for each coin**