2018 S Silver Eagle From Limited Edition Silver Proof Set Graded NGC PR-70 Limited Quanity. Add a map to your own listings. The item “2018 S NGC PR-70 Limited Edition Set Silver Proof American Eagle” is in sale since Wednesday, October 17, 2018. This item is in the category “Coins & Paper Money\Coins\ US\Commemorative\Modern Silver/Clad […]