American Eagle 2021 One Ounce Silver Reverse Proof Two-coin Set. The item "American Eagle 2021 One Ounce Silver Reverse Proof Two-Coin Set Designer Edition" is in sale since Friday, October 1, 2021. This item is in the category "Coins & Paper Money\Coins\ US\Proof Sets". The seller is "newproductseveryday" and is located in Frisco, Texas. This item can be shipped worldwide.