20th Anniversary Silver Eagle Set
The 20th Anniversary Silver Eagle Set was issued to celebrate two decades of issuance for the popular bullion and collector coins. The specially produced sets included three different coins, the 2006-W Proof Silver Eagle, 2006-W Uncirculated Silver Eagle, and the 2006-P Reverse Proof Silver Eagle. This is the first time the US Mint used the reverse proof minting technique.
The sets were limited to a mintage of only 250,000 and quickly sold out. The Reverse Proof Silver Eagle became one of the lower mintage keys for collectors of the series.