2019-2021 Limited Edition Silver Proof Sets - 22 Coins, 3 Complete Sets About 7oz Of Silver. 2019-2021 Limited Edition Silver Proof Sets - 22 Coins, 3 Complete Sets. All sets contain over 2oz of Silver! Since 2012, the San Francisco Mint issued special limited edition Silver Proof Sets containing only the silver coins of the standard set, plus a proof American Silver Eagle -- except for Two Silver Eagles in 2021! The sets have a mintage limit of 50,000 each. No set was issued for 2015.