2002 W American Silver Eagle proof coin, signed by Mercanti and graded as PF 70 by NGC. This coin is one of only 40 in the NGC Registry, making it highly sought after by collectors. Produced by the U.S. Mint, this silver coin has a fineness of 0.999 and contains 1 troy ounce of precious metal. Scarce, Purple Label US Mint Engraver Series.