2006 W Silver Eagle Proof 20th Anniversary Set NGC PF 70 (3). 3 - 1 OZ PERFECT NGC PF 70 COINS. The item "2006 W Silver Eagle Proof 20th Anniversary Set NGC PF 70 (3)" is in sale since Wednesday, March 30, 2016.This item is in the category "Coins & Paper Money\Bullion\Silver\Coins". The seller is "eagle-4-fun" and is located in Murrieta, California. This item can be shipped to United States, to Canada, to United Kingdom, to Germany, to Japan, to France, to Australia.