2012-2014 First 3 Years of Limited Edition Silver Proof Sets - 24 Coins, 3 Complete Sets Over About 7oz of silver. 2012-2014 First 3 Years of Limited Edition Silver Proof Sets - 24 Coins, 3 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. The sets have a mintage limit of 50,000 each. No set was issued for 2015.