2012-2023 Limited Edition Silver Proof Sets - 86 Coins, 12 Sets Total Over 27oz OF SILVER WOW!. 2012-2023 Limited Edition Silver Proof Sets - 86 Coins, 12 Sets Total. 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 (two Silver Eagles in 2021). The sets have a mintage limit of 50,000 each. No set was issued for 2015. Like the standard Silver Proof Set, all coins in the set are made with a composition of 99.9% starting in 2019.