What this coin looks like (obverse, reverse, mint mark location, special features, etc.): The 2011-P "Reverse Proof" American Silver Eagle was produced at the Philadelphia Mint using a highly innovative and technologically advanced minting process - which resulted in a coin with a frosty satin background field (like normal uncirculated silver eagles) but the details and designs have brilliant mirror-like features. This coin also bears the "P" mint mark.
This coin was intended for a 5-coin American Silver Eagle set commemorating the 25th anniversary of the American Silver Eagle series. Only 100000 sets produced - which included the 2011 bullion - burnished uncirculated (Philadelphia and San Francisco coins) - proof - and reverse proof coins
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD