1997 Liberty $100 Platinum Layered Eagle U.S. Coin Proof. First introduced in 1997, the American Platinum Eagle is the official U.S. platinum bullion coin. The highest denomination of any U.S. coin, the coin features a front-facing view of Lady Liberty on the obverse, designed by U.S. Mint Engraver John Mercanti. The reverse, designed by Thomas D. Rodgers, depicts an eagle, wings outstretched as it soars above the earth and sun. Beginning in 1998, thereverse design of the proof issues were alternated annually. The AMERICAN MINT EXCLUSIVE 1997 $100 Platinum Eagle replica coin is a brilliant replica of the first platinum bullion coin in American history.