The 2006 Reverse Proof Silver Eagle is the first Reverse Proof Silver Eagle to ever be produced by the U.S. Mint. It was released to celebrate the 20th Anniversary of the American Silver Eagle. Less than 250,000 of these stunning coins have ever been produced, making it one of the most scarce Silver Eagles out there. The Reverse Proof Silver Eagle may just be one of the most stunning coins ever produced as the high points are glossy and the fields (background) are frosted. Finding these in perfect grade Rev PF70 is no easy feat!